Research Publications
Browse peer-reviewed journal articles, conference papers, and scholarly publications. Use the filters below to refine results by type, author, year, or research area.
1.
Gangadharaiah, Y.; Mamatha, V.; Manjunatha, N.; Nagarathnamma, H.; Suma, S.
Stabilizing mechanisms in couple-stress porous media: roles of throughflow and gravity variation Journal Article
In: vol. 8, pp. 395+, 2025, ISBN: 2520-8179.
@article{616,
title = {Stabilizing mechanisms in couple-stress porous media: roles of throughflow and gravity variation},
author = {Y. Gangadharaiah and V. Mamatha and N. Manjunatha and H. Nagarathnamma and S. Suma},
url = {https://link.springer.com/article/10.1007/s41939-025-00990-1},
doi = {10.1007/s41939-025-00990-1},
isbn = {2520-8179},
year = {2025},
date = {2025-07-01},
volume = {8},
pages = {395+},
abstract = {This study examines the stability mechanism for couple-stress porous layer under the combined influence of throughflow and variable gravity. We analyse the onset of convective instability under the interactive influence of vertical throughflow and time-varying variable gravity, considering three distinct gravitational profiles: linear, parabolic, and exponential. Employing linear stability theory, the critical Rayleigh number is established with eigenvalue equations solved via dual methodologies: An analytical approach based on the regular perturbation technique, using the wave number as the perturbation parameter. and a numerical Galerkin approach. Both methods exhibit exceptional agreement, underscoring the robustness of the findings. A key contribution of this work is the comparative analysis of different gravity profiles, revealing that the exponential variation provides the strongest stabilizing effect, while the parabolic variation is the least effective. Furthermore, the study identifies a symmetric dependence of the critical Rayleigh number on the throughflow parameter, indicating that stability is governed by the magnitude of throughflow rather than its direction. In addition, a detailed analysis of vertical seepage velocity eigenfunctions highlights that advective transport is enhanced by increasing throughflow intensity and couple-stress effects. These findings offer insights into controlling convective instabilities in porous media applications such as geothermal energy extraction and oil recovery.},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This study examines the stability mechanism for couple-stress porous layer under the combined influence of throughflow and variable gravity. We analyse the onset of convective instability under the interactive influence of vertical throughflow and time-varying variable gravity, considering three distinct gravitational profiles: linear, parabolic, and exponential. Employing linear stability theory, the critical Rayleigh number is established with eigenvalue equations solved via dual methodologies: An analytical approach based on the regular perturbation technique, using the wave number as the perturbation parameter. and a numerical Galerkin approach. Both methods exhibit exceptional agreement, underscoring the robustness of the findings. A key contribution of this work is the comparative analysis of different gravity profiles, revealing that the exponential variation provides the strongest stabilizing effect, while the parabolic variation is the least effective. Furthermore, the study identifies a symmetric dependence of the critical Rayleigh number on the throughflow parameter, indicating that stability is governed by the magnitude of throughflow rather than its direction. In addition, a detailed analysis of vertical seepage velocity eigenfunctions highlights that advective transport is enhanced by increasing throughflow intensity and couple-stress effects. These findings offer insights into controlling convective instabilities in porous media applications such as geothermal energy extraction and oil recovery.
2.
Gangadharaiah, Y.; Mamatha, V.; Suma, S.
The Role of Viscous Dissipation and Gravity Variations on the Onset of Convection in a Porous Layer With Throughflow and a Magnetic Field Journal Article
In: Heat Transfer, vol. n/a, 2025, ISBN: 2688-4534.
@article{395,
title = {The Role of Viscous Dissipation and Gravity Variations on the Onset of Convection in a Porous Layer With Throughflow and a Magnetic Field},
author = {Y. Gangadharaiah and V. Mamatha and S. Suma},
url = {https://doi.org/10.1002/htj.23337},
doi = {10.1002/htj.23337},
isbn = {2688-4534},
year = {2025},
date = {2025-03-01},
journal = {Heat Transfer},
volume = {n/a},
publisher = {John Wiley & Sons, Ltd},
abstract = {This study explores the interplay between a magnetic field, viscous dissipation, and varying gravity profiles on the initiation of thermal convection in a porous medium with throughflow. Four gravity variation profiles?linear, parabolic, cubic, and exponential?are examined to determine their effects on the system's stability, using linear stability analysis with the normal mode technique, the Eigen function computed via a single-term Galerkin approximation, supported by computational tool Mathematica. Results demonstrate that exponential gravity variations provide the highest stability due to their rapidly increasing gravitational force, followed by linear, parabolic, and cubic profiles. Throughflow is found to enhance stability by reducing thermal gradients, while magnetic fields contribute to stabilization through Lorentz forces that oppose fluid motion. However, increasing viscous dissipation diminishes the stabilizing effects of both throughflow and magnetic fields. This study highlights the intricate interplay between these parameters and their collective role in determining the stability of the system, offering insights applicable to geophysical and engineering contexts involving porous media.},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This study explores the interplay between a magnetic field, viscous dissipation, and varying gravity profiles on the initiation of thermal convection in a porous medium with throughflow. Four gravity variation profiles?linear, parabolic, cubic, and exponential?are examined to determine their effects on the system's stability, using linear stability analysis with the normal mode technique, the Eigen function computed via a single-term Galerkin approximation, supported by computational tool Mathematica. Results demonstrate that exponential gravity variations provide the highest stability due to their rapidly increasing gravitational force, followed by linear, parabolic, and cubic profiles. Throughflow is found to enhance stability by reducing thermal gradients, while magnetic fields contribute to stabilization through Lorentz forces that oppose fluid motion. However, increasing viscous dissipation diminishes the stabilizing effects of both throughflow and magnetic fields. This study highlights the intricate interplay between these parameters and their collective role in determining the stability of the system, offering insights applicable to geophysical and engineering contexts involving porous media.
3.
Mamatha, V.; Gangadharaiah, Y. H.; Suma, S. P.; Akkanagamma, M.; Ananda, K.
In: Journal of Mines, Metals and Fuels, vol. 73, pp. 365-376,, 2025, ISBN: 00222755 (ISSN), (0).
@article{443,
title = {Combined Impact of Temperature-Dependent Heat Source and Gravity Fluctuation on the Onset of Darcy-Brinkman Reaction-Convection in an Anisotropic Porous Layer},
author = {V. Mamatha and Y. H. Gangadharaiah and S. P. Suma and M. Akkanagamma and K. Ananda},
url = {https://informaticsjournals.co.in/index.php/jmmf/article/view/46227},
doi = {10.18311/jmmf/2025/46227},
isbn = {00222755 (ISSN)},
year = {2025},
date = {2025-01-01},
journal = {Journal of Mines, Metals and Fuels},
volume = {73},
pages = {365-376,},
publisher = {Informatics Publishing Limited},
abstract = {This paper investigates the combined influence of temperature-dependent heat sources and gravitational fluctuations on the onset of double-diffusive reaction-convection in an anisotropic porous medium. The momentum equation is modelled using the Darcy-Brinkman approach, and linear stability analysis is conducted using normal mode analysis to formulate the eigenvalue problem. Four gravity functions linear, parabolic, cubic and exponential are analysed and the critical Rayleigh numbers for stationary and oscillatory modes are derived using a single-term Galerkin approximation. The results reveal that temperature-dependent heat sources, gravity variations, anisotropy and the Damkohler number significantly affect convection instability thresholds. Notably, exponential gravity fluctuations provide the highest system stability, delaying the onset of convection. These findings offer valuable insights into the stability behaviour of anisotropic porous systems, with applications in optimising geothermal energy systems, industrial heat management, porous media-based chemical reactors, groundwater filtration, subsurface energy storage and thermal insulation systems. Major Findings: The findings revealed that temperature-dependent heat sources and exponential gravity fluctuations delay convection onset, enhancing system stability. Linear, parabolic, and cubic gravity variations promote instability, reducing stability thresholds. Anisotropy amplifies system sensitivity to governing parameters, while the Damkohler number significantly influences instability. Exponential gravity fluctuations emerge as the most stabilizing factor.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This paper investigates the combined influence of temperature-dependent heat sources and gravitational fluctuations on the onset of double-diffusive reaction-convection in an anisotropic porous medium. The momentum equation is modelled using the Darcy-Brinkman approach, and linear stability analysis is conducted using normal mode analysis to formulate the eigenvalue problem. Four gravity functions linear, parabolic, cubic and exponential are analysed and the critical Rayleigh numbers for stationary and oscillatory modes are derived using a single-term Galerkin approximation. The results reveal that temperature-dependent heat sources, gravity variations, anisotropy and the Damkohler number significantly affect convection instability thresholds. Notably, exponential gravity fluctuations provide the highest system stability, delaying the onset of convection. These findings offer valuable insights into the stability behaviour of anisotropic porous systems, with applications in optimising geothermal energy systems, industrial heat management, porous media-based chemical reactors, groundwater filtration, subsurface energy storage and thermal insulation systems. Major Findings: The findings revealed that temperature-dependent heat sources and exponential gravity fluctuations delay convection onset, enhancing system stability. Linear, parabolic, and cubic gravity variations promote instability, reducing stability thresholds. Anisotropy amplifies system sensitivity to governing parameters, while the Damkohler number significantly influences instability. Exponential gravity fluctuations emerge as the most stabilizing factor.
4.
Kumar, C. M.; Myna, R.; Ramaprakash, C.; Anand, M. C. J.; Devana, P. S.; Pushpalatha, A. P.
Strategic integration of WASPAS method for effective traffic management and congestion control Book Chapter
In: pp. 193-220,, IGI Global, 2025, ISBN: 979-836936424-6 (ISBN); 979-836936422-2 (ISBN), (0).
@inbook{430,
title = {Strategic integration of WASPAS method for effective traffic management and congestion control},
author = {C. M. Kumar and R. Myna and C. Ramaprakash and M. C. J. Anand and P. S. Devana and A. P. Pushpalatha},
url = {https://www.igi-global.com/gateway/chapter/375751},
doi = {10.4018/979-8-3693-6422-2.ch010},
isbn = {979-836936424-6 (ISBN); 979-836936422-2 (ISBN)},
year = {2025},
date = {2025-01-01},
journal = {Networking, Transport, and Quality of Service in Vehicular Networks},
pages = {193-220,},
publisher = {IGI Global},
abstract = {Effective traffic management and congestion control are pivotal for sustainable urban development. This study proposes a Multi- Criteria Decision-Making (MCDM) approach, employing the Weighted Aggregated Sum Product Assessment (WASPAS) method, to address these obstacles. Integrating 30 diverse sub- criteria, including infrastructure capacity, environmental impact, and socio- economic elements, the model offers a comprehensive framework for decision- makers. By categorizing criteria through WASPAS, informed decisions can be made to optimize traffic flow and mitigate congestion. Here we highlight the innovative application of MCDM in transportation planning, emphasizing its potential to enhance urban mobility and promote sustainable development in increasingly congested urban environments.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {inbook}
}
Effective traffic management and congestion control are pivotal for sustainable urban development. This study proposes a Multi- Criteria Decision-Making (MCDM) approach, employing the Weighted Aggregated Sum Product Assessment (WASPAS) method, to address these obstacles. Integrating 30 diverse sub- criteria, including infrastructure capacity, environmental impact, and socio- economic elements, the model offers a comprehensive framework for decision- makers. By categorizing criteria through WASPAS, informed decisions can be made to optimize traffic flow and mitigate congestion. Here we highlight the innovative application of MCDM in transportation planning, emphasizing its potential to enhance urban mobility and promote sustainable development in increasingly congested urban environments.
5.
Kalaichelvan, K.; Naga, H. R. P. V.; Krishnan, M.; Joseph, K.
Fuzzy Inventory Grinding Production Process Optimization for Rotor Manufacturing using Weka Proceedings
American Institute of Physics, vol. 3283, 2025, ISBN: 0094243X (ISSN), (E0).
@proceedings{414,
title = {Fuzzy Inventory Grinding Production Process Optimization for Rotor Manufacturing using Weka},
author = {K. Kalaichelvan and H. R. P. V. Naga and M. Krishnan and K. Joseph},
url = {https://pubs.aip.org/aip/acp/article-abstract/3283/1/040022/3342691/Fuzzy-inventory-grinding-production-process?redirectedFrom=fulltext},
doi = {10.1063/5.0265827},
isbn = {0094243X (ISSN)},
year = {2025},
date = {2025-01-01},
journal = {AIP Conference Proceedings},
volume = {3283},
publisher = {American Institute of Physics},
abstract = {In this paper, a methodology for identifying process inventory variables that significantly affect process resource consumption is proposed. Since human processes in the operation and an inadequate time management system, measuring grinding time is challenging and inconsistent. This framework takes into account the challenges and unavailability of measuring these data. This paper’s goal is to reduce the overall cost to develop the new process and consume the time. We defuzzify the model using Trapezoidal Fuzzy Numbers (TFN) & Graded Mean Integration (GMI). To evaluate the inventory concept, created a dataset and calculated the profit and non profit total cost and use the Weka software to analyse the average order quantity.},
note = {E0},
keywords = {MATH},
pubstate = {published},
tppubtype = {proceedings}
}
In this paper, a methodology for identifying process inventory variables that significantly affect process resource consumption is proposed. Since human processes in the operation and an inadequate time management system, measuring grinding time is challenging and inconsistent. This framework takes into account the challenges and unavailability of measuring these data. This paper’s goal is to reduce the overall cost to develop the new process and consume the time. We defuzzify the model using Trapezoidal Fuzzy Numbers (TFN) & Graded Mean Integration (GMI). To evaluate the inventory concept, created a dataset and calculated the profit and non profit total cost and use the Weka software to analyse the average order quantity.
6.
Upadhya, S. M.; Suresh, S.; Kumar, Dinesh; Selvi, P. D.; Raju, Suresh; Raju, C.; SR, S.
In: Numerical Heat Transfer, Part B: Fundamentals, vol. 86, pp. 1111-1137,, 2025, ISBN: 10407790 (ISSN), (0).
@article{413,
title = {Comparison of SWCNT + MWCNT and SWCNT + MWCNT + Fe3O4 nanofluid across a spinning disk with suspended joule heating and non-linear thermal radiation: Multi-linear optimization},
author = {S. M. Upadhya and S. Suresh and Dinesh Kumar and P. D. Selvi and Suresh Raju and C. Raju and S. SR},
url = {https://www.tandfonline.com/doi/full/10.1080/10407790.2024.2302858},
doi = {10.1080/10407790.2024.2302858},
isbn = {10407790 (ISSN)},
year = {2025},
date = {2025-01-01},
journal = {Numerical Heat Transfer, Part B: Fundamentals},
volume = {86},
pages = {1111-1137,},
publisher = {Taylor and Francis Ltd.},
abstract = {Background: Fluid flow over an infinite impermeable rotating disk has profound applications in computer storage, lubrication, aerospace, chemical engineering, the geothermal industry, the food industry, the cooling of rotating machinery, gas turbines, thermal energy systems, etc. This motivated me to mathematically model the radiative magnetohydrodynamic Over an endlessly impermeable rotating disk, nanofluid flows. Appropriate similarity frameworks are utilized to solve the nonlinear PDEs. Methodology: Further, ODE45 (MATLAB) is used to analyze the transport of heat, mass, and flow. The distinction of this model is the mixture of nanoparticles in the fluid’s base. The flow is analyzed considering two cases. Case 1: (Formula presented.) and Case 2: (Formula presented.) Conclusion: A straightforward solution for the radial (Formula presented.) axial (Formula presented.) and azimuthal velocity (Formula presented.) heat and substance concentration (Formula presented.) is discovered, and its impact on fluid movement is studied with relation to several dimensionless characteristics. A good agreement is obtained in the present model with certain added features to the existing work. The primary finding of this research is the inclusion of SWCNT, and MWCNT has exhibited more comparing skin friction, the Nusselt number, and the Sherwood number SWCNT, MWCNT, and in the same carrier fluid. SWCNT and MWCNT In industrial procedures, nanoparticles are more effective for cooling purposes. Compared with SWCNT, MWCNT, and (Formula presented.).},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
Background: Fluid flow over an infinite impermeable rotating disk has profound applications in computer storage, lubrication, aerospace, chemical engineering, the geothermal industry, the food industry, the cooling of rotating machinery, gas turbines, thermal energy systems, etc. This motivated me to mathematically model the radiative magnetohydrodynamic Over an endlessly impermeable rotating disk, nanofluid flows. Appropriate similarity frameworks are utilized to solve the nonlinear PDEs. Methodology: Further, ODE45 (MATLAB) is used to analyze the transport of heat, mass, and flow. The distinction of this model is the mixture of nanoparticles in the fluid’s base. The flow is analyzed considering two cases. Case 1: (Formula presented.) and Case 2: (Formula presented.) Conclusion: A straightforward solution for the radial (Formula presented.) axial (Formula presented.) and azimuthal velocity (Formula presented.) heat and substance concentration (Formula presented.) is discovered, and its impact on fluid movement is studied with relation to several dimensionless characteristics. A good agreement is obtained in the present model with certain added features to the existing work. The primary finding of this research is the inclusion of SWCNT, and MWCNT has exhibited more comparing skin friction, the Nusselt number, and the Sherwood number SWCNT, MWCNT, and in the same carrier fluid. SWCNT and MWCNT In industrial procedures, nanoparticles are more effective for cooling purposes. Compared with SWCNT, MWCNT, and (Formula presented.).
7.
Jayaprakash, M. C.; Ramachandran, T.; Kumar, A. V.; Kaushik, V.; Joshi, S. K.; Siddesh, A. S.; Shah, N. A.; Rekha, J.
In: Pramana - Journal of Physics, vol. 99, 2025, ISBN: 03044289 (ISSN), (0).
@article{382,
title = {Significance of waste discharge concentration on the fluid flow over a squeezing porous slider: solution by improved residual power series method},
author = {M. C. Jayaprakash and T. Ramachandran and A. V. Kumar and V. Kaushik and S. K. Joshi and A. S. Siddesh and N. A. Shah and J. Rekha},
url = {https://link.springer.com/article/10.1007/s12043-024-02874-4},
doi = {10.1007/s12043-024-02874-4},
isbn = {03044289 (ISSN)},
year = {2025},
date = {2025-01-01},
journal = {Pramana - Journal of Physics},
volume = {99},
publisher = {Springer},
abstract = {The current analysis focusses on the three-dimensional viscous flow caused by an expanding or contracting porous slider under the impact of heat source/sink, magnetic field and waste discharge concentration. The amount of fluid injected to levitate the slider is not constant; rather, it varies over time based on the slider's location at any given moment. The fluid flow between the ground and the slider is represented by the unsteady nonlinear equations of motion, which are converted into ordinary differential equations by employing the apt similarity transformations. These simplified equations are solved by applying the hybrid residual power series method (HRPSM). Using graphical representations, the physical behaviour of significant parameters is investigated. Tabular data are used to compare the hybrid residual power series method and the numerical scheme to check the convergence and accuracy of the hybrid residual power series method. A rise in the magnetic parameter results in a very modest rise in the fluid's longitudinal velocity in the regions closest to the upper or lower plates and a clear drop in the liquid's longitudinal velocity in the centre region. An increase in pollutant external-source parameter increases the amount of pollutants introduced into the fluid system.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
The current analysis focusses on the three-dimensional viscous flow caused by an expanding or contracting porous slider under the impact of heat source/sink, magnetic field and waste discharge concentration. The amount of fluid injected to levitate the slider is not constant; rather, it varies over time based on the slider's location at any given moment. The fluid flow between the ground and the slider is represented by the unsteady nonlinear equations of motion, which are converted into ordinary differential equations by employing the apt similarity transformations. These simplified equations are solved by applying the hybrid residual power series method (HRPSM). Using graphical representations, the physical behaviour of significant parameters is investigated. Tabular data are used to compare the hybrid residual power series method and the numerical scheme to check the convergence and accuracy of the hybrid residual power series method. A rise in the magnetic parameter results in a very modest rise in the fluid's longitudinal velocity in the regions closest to the upper or lower plates and a clear drop in the liquid's longitudinal velocity in the centre region. An increase in pollutant external-source parameter increases the amount of pollutants introduced into the fluid system.
8.
Roja, A.; Srilatha, P.; Khan, U.; Ishak, A.; Verma, A.; Rekha, J. G.; Siddiqui, M. I. H.
Chemically reactive non-Newtonian fluid flow through a vertical microchannel with activation energy impacts: A numerical investigation Journal Article
In: Advances in Mechanical Engineering, vol. 16, 2024, ISBN: 16878132 (ISSN), (0).
@article{3,
title = {Chemically reactive non-Newtonian fluid flow through a vertical microchannel with activation energy impacts: A numerical investigation},
author = {A. Roja and P. Srilatha and U. Khan and A. Ishak and A. Verma and J. G. Rekha and M. I. H. Siddiqui},
doi = {10.1177/16878132241261472},
isbn = {16878132 (ISSN)},
year = {2024},
date = {2024-01-01},
journal = {Advances in Mechanical Engineering},
volume = {16},
publisher = {SAGE Publications Inc.},
abstract = {This work examines the second law analysis of an electrically conducting reactive third-grade fluid flow embedded with the porous medium in a microchannel with the influence of variable thermal conductivity, activation energy, viscous dissipation, joule heating, and radiative heat flux. A suitable non-dimensional variable is included into the governing equations to transform them into an ensemble of equations that are devoid of dimensions. The acquired equations are then tackled using the Runge Kutta Felhberg 4th and 5th order (RKF-45) approach in conjunction with the shooting methodology. Through comparison with the current results, the numerical results are verified, which provides a good agreement. From the present outcomes, it is established that the entropy generation is supreme for the viscous heating constraint, variable thermal conductivity, Frank Kameneski, heat source ratio parameter and third-grade fluid material constraint. The Bejan number boosts up with larger values of activation energy, and Frank Kameneski constraint and the decreasing nature is noticed for increasing third-grade material parameter, viscous heating parameter. With magnetism, the fluid’s velocity slows down because of a resistive force. A similar impact in the channel on velocity is noticed for larger third-grade fluid, activation energy parameter, and Frank-Kameniski parameters and increasing behavior is noticed for variable thermal conductivity, and permeability parameter. Further, it is cleared that the variable thermal conductivity assumption in the channel plate leads to a significant under prediction of the irreversibility rate. © The Author(s) 2024.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This work examines the second law analysis of an electrically conducting reactive third-grade fluid flow embedded with the porous medium in a microchannel with the influence of variable thermal conductivity, activation energy, viscous dissipation, joule heating, and radiative heat flux. A suitable non-dimensional variable is included into the governing equations to transform them into an ensemble of equations that are devoid of dimensions. The acquired equations are then tackled using the Runge Kutta Felhberg 4th and 5th order (RKF-45) approach in conjunction with the shooting methodology. Through comparison with the current results, the numerical results are verified, which provides a good agreement. From the present outcomes, it is established that the entropy generation is supreme for the viscous heating constraint, variable thermal conductivity, Frank Kameneski, heat source ratio parameter and third-grade fluid material constraint. The Bejan number boosts up with larger values of activation energy, and Frank Kameneski constraint and the decreasing nature is noticed for increasing third-grade material parameter, viscous heating parameter. With magnetism, the fluid’s velocity slows down because of a resistive force. A similar impact in the channel on velocity is noticed for larger third-grade fluid, activation energy parameter, and Frank-Kameniski parameters and increasing behavior is noticed for variable thermal conductivity, and permeability parameter. Further, it is cleared that the variable thermal conductivity assumption in the channel plate leads to a significant under prediction of the irreversibility rate. © The Author(s) 2024.
9.
C, Kumar; Benazir, A. J.; Ramesh, C. S.
Numerical investigation of heat and mass transfer of SWCNT/MWCNT-water suspension over a porous stretching sheet using Sisko fluid model Journal Article
In: ZAMM Zeitschrift fur Angewandte Mathematik und Mechanik, 2024, ISBN: 00442267 (ISSN), (0).
@article{28,
title = {Numerical investigation of heat and mass transfer of SWCNT/MWCNT-water suspension over a porous stretching sheet using Sisko fluid model},
author = {Kumar C and A. J. Benazir and C. S. Ramesh},
doi = {10.1002/zamm.202300573},
isbn = {00442267 (ISSN)},
year = {2024},
date = {2024-01-01},
journal = {ZAMM Zeitschrift fur Angewandte Mathematik und Mechanik},
publisher = {John Wiley and Sons Inc},
abstract = {This study presents a comprehensive numerical computation of heat-mass transfer characteristics of single-walled carbon nanotube (SWCNT)/multi-walled carbon nanotube (MWCNT)-water suspension flow over a porous stretching sheet with an inclined magnetic field. The governing equations for fluid flow characteristics are formulated using the Sisko fluid model to capture the Newtonian and non-Newtonian behavior of the nanotube-water mixture. The nonlinear coupled partial differential equations are converted into nonlinear dimensionless coupled ordinary differential equations using suitable similarity transformations. These equations are solved using MATLAB by implementing the four-stage Lobatto IIIa formula. The comprehensive set of computations is performed to explore the influence of pertinent parameters, including Sisko fluid parameters, concentration of nanotubes, stretching sheet velocity, and porous medium characteristics on the flow, heat, and mass transfer profiles. From the graphs and statistical analysis, it is clear that the volume fraction of SWCNT and MWCNTs are strongly correlated. The investigation reveals that increasing the inclination angle affects the fluid velocity. The variation in all flow features is negligible for volume fractions of CNTs between 0% and 10% but a significant effect is observed only beyond 10%. Higher volume fractions of CNTs result in enhanced local heat transfer coefficient. This can be attributed due to the outstanding heat transfer capabilities of CNTs owing to their high thermal conductivity. However, Shear thickening fluids exhibit high heat transfer phenomena when compared to shear-thinning and Newtonian fluids. This research provides valuable insights into the optimization of CNT-based nanofluids for efficient heat and mass transfer applications in electronics cooling, heat exchangers, and solar energy systems, offering opportunities to enhance energy efficiency and device performance. © 2024 Wiley-VCH GmbH.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This study presents a comprehensive numerical computation of heat-mass transfer characteristics of single-walled carbon nanotube (SWCNT)/multi-walled carbon nanotube (MWCNT)-water suspension flow over a porous stretching sheet with an inclined magnetic field. The governing equations for fluid flow characteristics are formulated using the Sisko fluid model to capture the Newtonian and non-Newtonian behavior of the nanotube-water mixture. The nonlinear coupled partial differential equations are converted into nonlinear dimensionless coupled ordinary differential equations using suitable similarity transformations. These equations are solved using MATLAB by implementing the four-stage Lobatto IIIa formula. The comprehensive set of computations is performed to explore the influence of pertinent parameters, including Sisko fluid parameters, concentration of nanotubes, stretching sheet velocity, and porous medium characteristics on the flow, heat, and mass transfer profiles. From the graphs and statistical analysis, it is clear that the volume fraction of SWCNT and MWCNTs are strongly correlated. The investigation reveals that increasing the inclination angle affects the fluid velocity. The variation in all flow features is negligible for volume fractions of CNTs between 0% and 10% but a significant effect is observed only beyond 10%. Higher volume fractions of CNTs result in enhanced local heat transfer coefficient. This can be attributed due to the outstanding heat transfer capabilities of CNTs owing to their high thermal conductivity. However, Shear thickening fluids exhibit high heat transfer phenomena when compared to shear-thinning and Newtonian fluids. This research provides valuable insights into the optimization of CNT-based nanofluids for efficient heat and mass transfer applications in electronics cooling, heat exchangers, and solar energy systems, offering opportunities to enhance energy efficiency and device performance. © 2024 Wiley-VCH GmbH.
10.
Rao, B. V. S.; Meenakshi, K.; Kalaiarasi, K.; Ramesh, B. P.; Kavitha, J.; Mukherjee, D.
Image Caption Generation Using Recurrent Convolutional Neural Network Journal Article
In: International Journal of Intelligent Systems and Applications in Engineering, vol. 12, pp. 76-80,, 2024, ISBN: 21476799 (ISSN), (0).
@article{81,
title = {Image Caption Generation Using Recurrent Convolutional Neural Network},
author = {B. V. S. Rao and K. Meenakshi and K. Kalaiarasi and B. P. Ramesh and J. Kavitha and D. Mukherjee},
isbn = {21476799 (ISSN)},
year = {2024},
date = {2024-01-01},
journal = {International Journal of Intelligent Systems and Applications in Engineering},
volume = {12},
pages = {76-80,},
publisher = {Ismail Saritas},
abstract = {This paper presents a residual learning (RL) approach to generate automated captions for any given image. In this approach, a convolutional neural network (CNN) is employed to extract the spectral and spatial characteristics of the image, which is essential to solve the caption generation problem, which necessitates the use of CNN. In addition to this, we consider the nuanced quality of language by incorporating an image annotation generator into the system that has been recommended. The results of the experiments that have been presented here provide convincing evidence that the developed model is an improvement upon the various approaches to image captioning that are currently being used. © 2024, Ismail Saritas. All rights reserved.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
This paper presents a residual learning (RL) approach to generate automated captions for any given image. In this approach, a convolutional neural network (CNN) is employed to extract the spectral and spatial characteristics of the image, which is essential to solve the caption generation problem, which necessitates the use of CNN. In addition to this, we consider the nuanced quality of language by incorporating an image annotation generator into the system that has been recommended. The results of the experiments that have been presented here provide convincing evidence that the developed model is an improvement upon the various approaches to image captioning that are currently being used. © 2024, Ismail Saritas. All rights reserved.
11.
Rekha, J.; Suma, S. P.; Shilpa, B.; Khan, U.; Hussain, S. M.; Zaib, A.; Galal, A. M.
Solute transport exponentially varies with time in an unsaturated zone using finite element and finite difference method Journal Article
In: International Journal of Modern Physics B, vol. 37, pp. 2350089+, 2023, ISBN: 02179792 (ISSN), (4).
@article{5,
title = {Solute transport exponentially varies with time in an unsaturated zone using finite element and finite difference method},
author = {J. Rekha and S. P. Suma and B. Shilpa and U. Khan and S. M. Hussain and A. Zaib and A. M. Galal},
doi = {10.1142/S0217979223500893},
isbn = {02179792 (ISSN)},
year = {2023},
date = {2023-01-01},
journal = {International Journal of Modern Physics B},
volume = {37},
pages = {2350089+},
publisher = {World Scientific},
abstract = {Among several aspects, the one contributing towards the difficulty of groundwater quality evaluation is the large diversity of contamination sources. As contaminants comprising various compounds move from the soil to the water table, they will travel through several hydrologic zones. In constant unidirectional flow fields, a mathematical study of simultaneous adsorption and dispersion of a solute inside homogeneous and isotropic permeable media is described. The solute is adsorbed at a rate proportionate to its concentration in the dispersion systems, which are susceptible to input concentrations that fluctuate exponentially with time. The advection-dispersion equation (ADE) was solved numerically in this work to analyze the pollutants transport bearing in mind the coefficient of distribution and permeability by considering pollutant input concentrations. The solution is derived using the Laplace transform and Duhamel's theorem with moving coordinates. For specified medium and fluid characteristics, mathematical methods are created to forecast the concentration of pollutants in adsorbing porous media. © 2023 World Scientific Publishing Company.},
note = {4},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
Among several aspects, the one contributing towards the difficulty of groundwater quality evaluation is the large diversity of contamination sources. As contaminants comprising various compounds move from the soil to the water table, they will travel through several hydrologic zones. In constant unidirectional flow fields, a mathematical study of simultaneous adsorption and dispersion of a solute inside homogeneous and isotropic permeable media is described. The solute is adsorbed at a rate proportionate to its concentration in the dispersion systems, which are susceptible to input concentrations that fluctuate exponentially with time. The advection-dispersion equation (ADE) was solved numerically in this work to analyze the pollutants transport bearing in mind the coefficient of distribution and permeability by considering pollutant input concentrations. The solution is derived using the Laplace transform and Duhamel's theorem with moving coordinates. For specified medium and fluid characteristics, mathematical methods are created to forecast the concentration of pollutants in adsorbing porous media. © 2023 World Scientific Publishing Company.
12.
Patel, S.; Dinesh, P. A.; Suma, S. P.; Sushma, T. C.; Gayathri, M. S.
Characteristic Analysis of Soret and Corolis Forces on a Natural Convection in a Finite Cavity with Isotropic and Anisotropic Permeable Media Journal Article
In: Journal of Mines, Metals and Fuels, vol. 71, pp. 2708-2717,, 2023, ISBN: 00222755 (ISSN), (0).
@article{35,
title = {Characteristic Analysis of Soret and Corolis Forces on a Natural Convection in a Finite Cavity with Isotropic and Anisotropic Permeable Media},
author = {S. Patel and P. A. Dinesh and S. P. Suma and T. C. Sushma and M. S. Gayathri},
doi = {10.18311/jmmf/2023/41762},
isbn = {00222755 (ISSN)},
year = {2023},
date = {2023-01-01},
journal = {Journal of Mines, Metals and Fuels},
volume = {71},
pages = {2708-2717,},
publisher = {Informatics Publishing Limited and Books and Journals Private Ltd},
abstract = {Using 3D transmission in a definite cavity with anisotropic and isotropic permeable media rotating at a fixed rotational velocity, the Rayleigh-Benard issue for a viscous, unstable, laminar, incompressible fluid heated from below a horizontal layer is extended in this paper's research. Seven controlling PDEs from the given physical configuration are similarly transformed to produce a system of non-dimensional ODEs. The Rayleigh, Taylor, and Prandtl numbers are examined for their impacts on temperature gradient and velocity in both isotropic and anisotropic conditions using the Fourier series approach. It has been discussed and determined that the results of the stream function and isotherms on a variety of factors are good. © 2023, Informatics Publishing Limited and Books and Journals Private Ltd. All rights reserved.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
Using 3D transmission in a definite cavity with anisotropic and isotropic permeable media rotating at a fixed rotational velocity, the Rayleigh-Benard issue for a viscous, unstable, laminar, incompressible fluid heated from below a horizontal layer is extended in this paper's research. Seven controlling PDEs from the given physical configuration are similarly transformed to produce a system of non-dimensional ODEs. The Rayleigh, Taylor, and Prandtl numbers are examined for their impacts on temperature gradient and velocity in both isotropic and anisotropic conditions using the Fourier series approach. It has been discussed and determined that the results of the stream function and isotherms on a variety of factors are good. © 2023, Informatics Publishing Limited and Books and Journals Private Ltd. All rights reserved.
13.
Sunitha, M.; Gamaoun, F.; Abdulrahman, A.; Malagi, Sanju; Singh, S.; Gowda, Javare; Gowda, R. J.
An efficient analytical approach with novel integral transform to study the two-dimensional solute transport problem Journal Article
In: Ain Shams Engineering Journal, vol. 14, pp. 101878+, 2023, ISBN: 20904479 (ISSN), (11).
@article{15,
title = {An efficient analytical approach with novel integral transform to study the two-dimensional solute transport problem},
author = {M. Sunitha and F. Gamaoun and A. Abdulrahman and Sanju Malagi and S. Singh and Javare Gowda and R. J. Gowda},
doi = {10.1016/j.asej.2022.101878},
isbn = {20904479 (ISSN)},
year = {2023},
date = {2023-01-01},
journal = {Ain Shams Engineering Journal},
volume = {14},
pages = {101878+},
publisher = {Ain Shams University},
abstract = {The q-homotopy analysis method (q-HAM) in combine with the novel integral transform known as Elzaki transform (ET) leads to an efficient analytical technique called, the q-homotopy analysis Elzaki transform method (q-HAETM). In the present study, the two- dimensional advection–dispersion (AD) problem is investigated using an analytical technique q-HAETM. These equations are mainly used to describe the fate of pollutants in aquifers. The analytical solutions to the AD equations are more interesting since they serve as benchmarks against which numerical solutions can be compared. The novelty of the work is to discuss the two-dimensional (2D) solute transport problem in the fractional sense. The reliability and the efficiency of the considered algorithm are demonstrated by employing the 2D fractional solute transport problem. The solute concentration profile is shown in terms of surface plots. The comparison of the exact solution and the approximate solution is done by the 2D plots. The numerical approximate error solutions are presented for different fractional orders. q-HAETM offers us to modulate the range of convergence of the series solution using ℏ, called auxiliary parameter or convergence control parameter. By performing appropriate numerical simulations in comparison with other existing techniques, the effectiveness and reliability of the considered technique are validated. The obtained findings show that the proposed method is very gratifying and examines the complex challenges that arise in science and innovation. © 2022 Faculty of Engineering, Ain Shams University},
note = {11},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
The q-homotopy analysis method (q-HAM) in combine with the novel integral transform known as Elzaki transform (ET) leads to an efficient analytical technique called, the q-homotopy analysis Elzaki transform method (q-HAETM). In the present study, the two- dimensional advection–dispersion (AD) problem is investigated using an analytical technique q-HAETM. These equations are mainly used to describe the fate of pollutants in aquifers. The analytical solutions to the AD equations are more interesting since they serve as benchmarks against which numerical solutions can be compared. The novelty of the work is to discuss the two-dimensional (2D) solute transport problem in the fractional sense. The reliability and the efficiency of the considered algorithm are demonstrated by employing the 2D fractional solute transport problem. The solute concentration profile is shown in terms of surface plots. The comparison of the exact solution and the approximate solution is done by the 2D plots. The numerical approximate error solutions are presented for different fractional orders. q-HAETM offers us to modulate the range of convergence of the series solution using ℏ, called auxiliary parameter or convergence control parameter. By performing appropriate numerical simulations in comparison with other existing techniques, the effectiveness and reliability of the considered technique are validated. The obtained findings show that the proposed method is very gratifying and examines the complex challenges that arise in science and innovation. © 2022 Faculty of Engineering, Ain Shams University
14.
Suresh, S.; Shanthi, S. R.; Upadhya, M. S.
Comparison of steady incompressible micropolar and nanofluid flow with heat and mass transfer applications Book Chapter
In: pp. 133-151,, Elsevier Inc., 2022, ISBN: 978-012823140-1 (ISBN); 978-012823141-8 (ISBN), (1).
@inbook{196,
title = {Comparison of steady incompressible micropolar and nanofluid flow with heat and mass transfer applications},
author = {S. Suresh and S. R. Shanthi and M. S. Upadhya},
doi = {10.1016/B978-0-12-823140-1.00002-6},
isbn = {978-012823140-1 (ISBN); 978-012823141-8 (ISBN)},
year = {2022},
date = {2022-01-01},
journal = {Micro and Nanofluid Convection with Magnetic Field Effects for Heat and Mass Transfer Applications using MATLAB®},
pages = {133-151,},
publisher = {Elsevier Inc.},
abstract = {The underlying intention of this study is to oversee the flow, heat, and mass transport of nanofluid (hematite + water) and micropolar fluid flow across a bending (curved) stretching sheet. The influence of radiation, cross-diffusion, and applied magnetic fields are also investigated. The total entropy rate of the micropolar and nanofluid is discussed, and the flow equation is modeled by a curvilinear coordinate system. Appropriate similarity transformations are applied to modify the governing nonlinear partial differential (PD) equations into ordinary differential (OD) equations. The proposed system is numerically solved with a shooting procedure (bvp4c), and outcomes are explained through graphs and tables. Comparative studies of the obtained results with previously published results are discussed. The main outcomes of this study include: nanofluid has a higher temperature profile compared to micropolar fluid; micropolar fluids and nanofluids show little variation in entropy generation; the Brinkman number reduces the thermal boundary layer in both cases; increasing the chemical reaction reduces the concentration field in cases both with and without magnetic fields; and thermal radiation encourages heat and mass transfer rates of the flow in both nanofluids and micropolar fluids. © 2022 Elsevier Inc. All rights reserved.},
note = {1},
keywords = {MATH},
pubstate = {published},
tppubtype = {inbook}
}
The underlying intention of this study is to oversee the flow, heat, and mass transport of nanofluid (hematite + water) and micropolar fluid flow across a bending (curved) stretching sheet. The influence of radiation, cross-diffusion, and applied magnetic fields are also investigated. The total entropy rate of the micropolar and nanofluid is discussed, and the flow equation is modeled by a curvilinear coordinate system. Appropriate similarity transformations are applied to modify the governing nonlinear partial differential (PD) equations into ordinary differential (OD) equations. The proposed system is numerically solved with a shooting procedure (bvp4c), and outcomes are explained through graphs and tables. Comparative studies of the obtained results with previously published results are discussed. The main outcomes of this study include: nanofluid has a higher temperature profile compared to micropolar fluid; micropolar fluids and nanofluids show little variation in entropy generation; the Brinkman number reduces the thermal boundary layer in both cases; increasing the chemical reaction reduces the concentration field in cases both with and without magnetic fields; and thermal radiation encourages heat and mass transfer rates of the flow in both nanofluids and micropolar fluids. © 2022 Elsevier Inc. All rights reserved.
15.
Gowda, R. J.; Singh, S.; Padmarajaiah, S. S.; Khan, U.; Zaib, A.; Weera, W.
An Investigation of Fractional One-Dimensional Groundwater Recharge by Spreading Using an Efficient Analytical Technique Journal Article
In: Fractal and Fractional, vol. 6, pp. 249+, 2022, ISBN: 25043110 (ISSN), (1).
@article{179,
title = {An Investigation of Fractional One-Dimensional Groundwater Recharge by Spreading Using an Efficient Analytical Technique},
author = {R. J. Gowda and S. Singh and S. S. Padmarajaiah and U. Khan and A. Zaib and W. Weera},
doi = {10.3390/fractalfract6050249},
isbn = {25043110 (ISSN)},
year = {2022},
date = {2022-01-01},
journal = {Fractal and Fractional},
volume = {6},
pages = {249+},
publisher = {MDPI},
abstract = {In the present work, the q-homotopy analysis transform method (q-HATM) was used to gen-erate an analytical solution for the moisture content distribution in a one-dimensional vertical ground-water recharge problem. Three scenarios for the Brooks–Corey model are studied based on linear and nonlinear diffusivity and conductivity functions. The governing nonlinear fractional partial differential equations are solved effectively by the combination of a hybrid analytical technique, which is the combination of the q-homotopy analysis method and the Laplace transform method. Figures and tables are used to discuss the outcomes for fractional values of the time derivative. Mathematica software is used to plot the figures. The examples used in this paper demonstrate the accuracy and competence of the considered algorithm. The acquired results demonstrate the efficiency and reliability of the pro-jected scheme and are also suitable to carry out the highly nonlinear complex problems in a real-world scenario. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},
note = {1},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
In the present work, the q-homotopy analysis transform method (q-HATM) was used to gen-erate an analytical solution for the moisture content distribution in a one-dimensional vertical ground-water recharge problem. Three scenarios for the Brooks–Corey model are studied based on linear and nonlinear diffusivity and conductivity functions. The governing nonlinear fractional partial differential equations are solved effectively by the combination of a hybrid analytical technique, which is the combination of the q-homotopy analysis method and the Laplace transform method. Figures and tables are used to discuss the outcomes for fractional values of the time derivative. Mathematica software is used to plot the figures. The examples used in this paper demonstrate the accuracy and competence of the considered algorithm. The acquired results demonstrate the efficiency and reliability of the pro-jected scheme and are also suitable to carry out the highly nonlinear complex problems in a real-world scenario. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
16.
Suresh, S.; Shanthi, S. R.
Mathematical model of steady incompressible nanofluid for heat transfer applications using MATLAB® Book Chapter
In: pp. 31-58,, Elsevier Inc., 2022, ISBN: 978-012823140-1 (ISBN); 978-012823141-8 (ISBN), (1).
@inbook{114,
title = {Mathematical model of steady incompressible nanofluid for heat transfer applications using MATLAB®},
author = {S. Suresh and S. R. Shanthi},
doi = {10.1016/B978-0-12-823140-1.00003-8},
isbn = {978-012823140-1 (ISBN); 978-012823141-8 (ISBN)},
year = {2022},
date = {2022-01-01},
journal = {Micro and Nanofluid Convection with Magnetic Field Effects for Heat and Mass Transfer Applications using MATLAB®},
pages = {31-58,},
publisher = {Elsevier Inc.},
abstract = {Adding different nanoparticles to the base fluid is the latest technique for increasing the thermal performance of conventional fluids. In this study, the flow and heat transfer of nanofluids over a rotating disk with uniform stretching rate are studied. The non-Fourier flux, magnetic field, and thermal radiation are considered. The nanoparticles used here are graphene, copper, and Al2O3, with water used as the base fluid. The governing equations are transformed by applying Von Karman transformation and then solved numerically through a boundary value problem solver (bvp5c). The authors also provide some of the results of cases with and without magnetic fields and describe variations in both situations. For the engineering perspectives, the authors also calculate the governing physical quantities such as skin friction factor coefficients and local Nusselt number for all three cases (graphene, copper, and aluminum oxide nanoparticles). The results indicate that with increases in the stretching strength parameter, the skin friction, and the local Nusselt number, the velocity in radial and axial directions increases, whereas the velocity in the tangential direction and the thermal boundary layer thickness decrease, respectively. The simulation is performed by mixing the water with three different solid nanoparticles, copper, aluminum oxide, and graphene, wit variations found in the three cases. © 2022 Elsevier Inc. All rights reserved.},
note = {1},
keywords = {MATH},
pubstate = {published},
tppubtype = {inbook}
}
Adding different nanoparticles to the base fluid is the latest technique for increasing the thermal performance of conventional fluids. In this study, the flow and heat transfer of nanofluids over a rotating disk with uniform stretching rate are studied. The non-Fourier flux, magnetic field, and thermal radiation are considered. The nanoparticles used here are graphene, copper, and Al2O3, with water used as the base fluid. The governing equations are transformed by applying Von Karman transformation and then solved numerically through a boundary value problem solver (bvp5c). The authors also provide some of the results of cases with and without magnetic fields and describe variations in both situations. For the engineering perspectives, the authors also calculate the governing physical quantities such as skin friction factor coefficients and local Nusselt number for all three cases (graphene, copper, and aluminum oxide nanoparticles). The results indicate that with increases in the stretching strength parameter, the skin friction, and the local Nusselt number, the velocity in radial and axial directions increases, whereas the velocity in the tangential direction and the thermal boundary layer thickness decrease, respectively. The simulation is performed by mixing the water with three different solid nanoparticles, copper, aluminum oxide, and graphene, wit variations found in the three cases. © 2022 Elsevier Inc. All rights reserved.
17.
Gangadharaiah, Y. H.; Chaya, T. Y.; Suma, S. P.
Linear and Nonlinear Gravity Field Variation on Double-Diffusive Convection in a Porous Layer Proceedings
Springer Science and Business Media Deutschland GmbH, 2021, ISBN: 21954356 (ISSN); 978-981160941-1 (ISBN), (2).
@proceedings{165,
title = {Linear and Nonlinear Gravity Field Variation on Double-Diffusive Convection in a Porous Layer},
author = {Y. H. Gangadharaiah and T. Y. Chaya and S. P. Suma},
doi = {10.1007/978-981-16-0942-8_47},
isbn = {21954356 (ISSN); 978-981160941-1 (ISBN)},
year = {2021},
date = {2021-01-01},
journal = {Lecture Notes in Mechanical Engineering},
pages = {499-507,},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {This paper analyzes the instability of a gravity field in a double-diffusive convective motion in horizontal porous matrix, heated from below uniformly with the inclusion of the Soret parameter. The critical Rayleigh numbers for the onset of stationary and oscillatory modes have been calculated by using the higher-order Gelerkin technique. We addressed four separate cases of linear and nonlinear gravity variation: (1) H(z) = - z (2) H(z) = - z2 (3) H(z) = - z3 and (4) H(z) = - (ez- 1 ). The gravity parameters Soret parameter and solute Rayleigh number on stationary and oscillatory convection and heat and mass transfer are graphically illustrated. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.},
note = {2},
keywords = {MATH},
pubstate = {published},
tppubtype = {proceedings}
}
This paper analyzes the instability of a gravity field in a double-diffusive convective motion in horizontal porous matrix, heated from below uniformly with the inclusion of the Soret parameter. The critical Rayleigh numbers for the onset of stationary and oscillatory modes have been calculated by using the higher-order Gelerkin technique. We addressed four separate cases of linear and nonlinear gravity variation: (1) H(z) = - z (2) H(z) = - z2 (3) H(z) = - z3 and (4) H(z) = - (ez- 1 ). The gravity parameters Soret parameter and solute Rayleigh number on stationary and oscillatory convection and heat and mass transfer are graphically illustrated. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
18.
Patel, S.; Dinesh, P. A.; Suma, S. P.; Ramesh, N. L.
Springer, 2021, ISBN: 21954356 (ISSN); 978-981154307-4 (ISBN), (2).
@proceedings{152,
title = {Characteristic Study of Coriolis Force on Free Convection in a Finite Geometry with Isotropic and Anisotropic Porous Media},
author = {S. Patel and P. A. Dinesh and S. P. Suma and N. L. Ramesh},
doi = {10.1007/978-981-15-4308-1_76},
isbn = {21954356 (ISSN); 978-981154307-4 (ISBN)},
year = {2021},
date = {2021-01-01},
journal = {Lecture Notes in Mechanical Engineering},
pages = {985-997,},
publisher = {Springer},
abstract = {Work carried out in this paper deals with classic Rayleigh–Bѐnard problem for an unsteady, laminar, viscous incompressible fluid of a horizontal layer heated from below which is extended to the three-dimensional convection in a rectangular box with anisotropic and isotropic porous media rotating with constant angular velocity that is investigated. For the given physical system, seven governing PDEs are transformed to system of non-dimensional ODEs using similarity transformation. The investigation demands to apply Fourier series method to study the characteristic of velocity and temperature for the effect of Taylor number, Rayleigh number and Prandtl number for both isotropic and anisotropic cases. The results of the stream function and isotherms on various parameters have been discussed and found to be good agreement for the physical system. © 2021, Springer Nature Singapore Pte Ltd.},
note = {2},
keywords = {MATH},
pubstate = {published},
tppubtype = {proceedings}
}
Work carried out in this paper deals with classic Rayleigh–Bѐnard problem for an unsteady, laminar, viscous incompressible fluid of a horizontal layer heated from below which is extended to the three-dimensional convection in a rectangular box with anisotropic and isotropic porous media rotating with constant angular velocity that is investigated. For the given physical system, seven governing PDEs are transformed to system of non-dimensional ODEs using similarity transformation. The investigation demands to apply Fourier series method to study the characteristic of velocity and temperature for the effect of Taylor number, Rayleigh number and Prandtl number for both isotropic and anisotropic cases. The results of the stream function and isotherms on various parameters have been discussed and found to be good agreement for the physical system. © 2021, Springer Nature Singapore Pte Ltd.
19.
Seethappa, J.; Ramarao, I.; Murthy, M. K.; Padmarajaiah, S. S.
An analytical study of mass transfer by stent based drug delivery system Proceedings
American Institute of Physics Inc., vol. 2112, 2019, ISBN: 0094243X (ISSN); 978-073541844-8 (ISBN), (2).
@proceedings{260,
title = {An analytical study of mass transfer by stent based drug delivery system},
author = {J. Seethappa and I. Ramarao and M. K. Murthy and S. S. Padmarajaiah},
doi = {10.1063/1.5112257},
isbn = {0094243X (ISSN); 978-073541844-8 (ISBN)},
year = {2019},
date = {2019-01-01},
journal = {AIP Conference Proceedings},
volume = {2112},
pages = {020072+},
publisher = {American Institute of Physics Inc.},
abstract = {An attempt is made to model the stent based drug delivery by assuming a rectangular channel divided into a lumen region, stent placed in the wall region and porous wall. Velocity, concentration and dispersion coefficient at large time are analytically obtained through modified Gill and Sankarasubramanian approach. The results are graphically depicted. Results show that diffusion coefficient is the main factor which affects the mass transfer. © 2019 Author(s).},
note = {2},
keywords = {MATH},
pubstate = {published},
tppubtype = {proceedings}
}
An attempt is made to model the stent based drug delivery by assuming a rectangular channel divided into a lumen region, stent placed in the wall region and porous wall. Velocity, concentration and dispersion coefficient at large time are analytically obtained through modified Gill and Sankarasubramanian approach. The results are graphically depicted. Results show that diffusion coefficient is the main factor which affects the mass transfer. © 2019 Author(s).
20.
Shivakumara, I. S.; Ravisha, M.; Akkanagamma, M.; Mamatha, A. L.
Effects of alternating current electric field and thermal non-equilibrium on the Brinkman-Bénard instability Journal Article
In: Special Topics and Reviews in Porous Media, vol. 8, pp. 17-37,, 2017, ISBN: 21514798 (ISSN), (3).
@article{258,
title = {Effects of alternating current electric field and thermal non-equilibrium on the Brinkman-Bénard instability},
author = {I. S. Shivakumara and M. Ravisha and M. Akkanagamma and A. L. Mamatha},
doi = {10.1615/SpecialTopicsRevPorousMedia.v8.i1.20},
isbn = {21514798 (ISSN)},
year = {2017},
date = {2017-01-01},
journal = {Special Topics and Reviews in Porous Media},
volume = {8},
pages = {17-37,},
publisher = {Begell House Inc.},
abstract = {The onset of thermal convection in a layer of dielectric fluid-saturated Brinkman porous medium is investigated under the influence of a uniform vertical alternating current (AC) electric field using a local thermal non-equilibrium (LTNE) model considering the boundaries to be either free-free or rigid-rigid or lower rigid and upper free. It has been shown that the principle of exchange of stability is valid irrespective of the nature of boundaries. The eigenvalue problem is solved exactly for free-free boundaries and numerically using shooting method for rigid-rigid and lower rigid-upper free boundaries. The results for different velocity boundary conditions are found to be qualitatively similar but differ only quantitatively. It is observed that an increase in the AC electric Rayleigh number Rea is to augment heat transfer and to hasten the onset of convection, while an increase in the inter-phase heat transfer coefficient H, inverse Darcy number Da-1, and the ratio of viscosities Λ as well as a decrease in the porosity modified conductivity ratio γ is to delay the onset of electrothermal convection. Besides, increase in Rea and Da-1 as well as decrease in γ, H, and Λ is to reduce the size of convection cells. Asymptotic solutions for both small and large values of H for free-free boundaries compare well with those obtained from the exact formula. © 2017 by Begell House, Inc.},
note = {3},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
The onset of thermal convection in a layer of dielectric fluid-saturated Brinkman porous medium is investigated under the influence of a uniform vertical alternating current (AC) electric field using a local thermal non-equilibrium (LTNE) model considering the boundaries to be either free-free or rigid-rigid or lower rigid and upper free. It has been shown that the principle of exchange of stability is valid irrespective of the nature of boundaries. The eigenvalue problem is solved exactly for free-free boundaries and numerically using shooting method for rigid-rigid and lower rigid-upper free boundaries. The results for different velocity boundary conditions are found to be qualitatively similar but differ only quantitatively. It is observed that an increase in the AC electric Rayleigh number Rea is to augment heat transfer and to hasten the onset of convection, while an increase in the inter-phase heat transfer coefficient H, inverse Darcy number Da-1, and the ratio of viscosities Λ as well as a decrease in the porosity modified conductivity ratio γ is to delay the onset of electrothermal convection. Besides, increase in Rea and Da-1 as well as decrease in γ, H, and Λ is to reduce the size of convection cells. Asymptotic solutions for both small and large values of H for free-free boundaries compare well with those obtained from the exact formula. © 2017 by Begell House, Inc.
21.
Vajravelu, K.; Prasad, K. V.; Santhi, S. R.; Umesh, V.
Fluid flow and heat transfer over a permeable stretching cylinder Journal Article
In: Journal of Applied Fluid Mechanics, vol. 7, pp. 111-120,, 2014, ISBN: 17353572 (ISSN), (20).
@article{319,
title = {Fluid flow and heat transfer over a permeable stretching cylinder},
author = {K. Vajravelu and K. V. Prasad and S. R. Santhi and V. Umesh},
doi = {10.36884/jafm.7.01.21135},
isbn = {17353572 (ISSN)},
year = {2014},
date = {2014-01-01},
journal = {Journal of Applied Fluid Mechanics},
volume = {7},
pages = {111-120,},
publisher = {Isfahan University of Technology},
abstract = {In this paper, we analyze the effects of thermo-physical properties on the axisymmetric flow of a viscous fluid induced by a stretching cylinder in the presence of internal heat generation/absorption. It is assumed that the cylinder is stretched in the axial direction with a linear velocity and the surface temperature of the cylinder is subjected to vary linearly. Here, the temperature dependent thermo-physical properties namely, the fluid viscosity and the fluid thermal conductivity are respectively assumed to vary as an inverse function of the temperature and a linear function of the temperature. The governing system of partial differential equations is converted into a system of coupled non-linear ordinary differential equations with variable coefficients. The resulting system is solved numerically using a second order finite difference scheme known as the Keller-box method. The governing equations of the problem show that the flow and heat transfer characteristics depend on six parameters, namely the curvature parameter, fluid viscosity parameter, injection/suction parameter, variable thermal conductivity parameter, heat source/sink parameter and the Prandtl number. The numerical values obtained for the velocity, temperature, skin friction, and the Nusselt number are presented through graphs and tables for several sets of values of the pertinent parameters. The results obtained for the flow and heat transfer characteristics reveal many interesting behaviors that warrant further study on the axisymmetric flow phenomena. Comparisons with the available results in the literature are presented as special cases.},
note = {20},
keywords = {MATH},
pubstate = {published},
tppubtype = {article}
}
In this paper, we analyze the effects of thermo-physical properties on the axisymmetric flow of a viscous fluid induced by a stretching cylinder in the presence of internal heat generation/absorption. It is assumed that the cylinder is stretched in the axial direction with a linear velocity and the surface temperature of the cylinder is subjected to vary linearly. Here, the temperature dependent thermo-physical properties namely, the fluid viscosity and the fluid thermal conductivity are respectively assumed to vary as an inverse function of the temperature and a linear function of the temperature. The governing system of partial differential equations is converted into a system of coupled non-linear ordinary differential equations with variable coefficients. The resulting system is solved numerically using a second order finite difference scheme known as the Keller-box method. The governing equations of the problem show that the flow and heat transfer characteristics depend on six parameters, namely the curvature parameter, fluid viscosity parameter, injection/suction parameter, variable thermal conductivity parameter, heat source/sink parameter and the Prandtl number. The numerical values obtained for the velocity, temperature, skin friction, and the Nusselt number are presented through graphs and tables for several sets of values of the pertinent parameters. The results obtained for the flow and heat transfer characteristics reveal many interesting behaviors that warrant further study on the axisymmetric flow phenomena. Comparisons with the available results in the literature are presented as special cases.
22.
Indumathi, T. S.; Rajappa, V.; Vasista, S. A.; Praveen, N.
Optimization of optical switches in ROADM with different operating conditions Proceedings
2012, ISBN: 978-146732463-2 (ISBN), (0).
@proceedings{312,
title = {Optimization of optical switches in ROADM with different operating conditions},
author = {T. S. Indumathi and V. Rajappa and S. A. Vasista and N. Praveen},
doi = {10.1109/ICOE.2012.6409566},
isbn = {978-146732463-2 (ISBN)},
year = {2012},
date = {2012-01-01},
journal = {2012 International Conference on Optical Engineering, ICOE 2012},
pages = {6409566+},
abstract = {Reconfigurable Optical Add/Drop Multiplexers (ROADMs) are optical modules capable of adding/dropping or passing through any or all wavelengths present in DWDM signal with remote management capability. In performance of ROADMs, routing power 'R' which is a figure of merit has been used. The wavelength routing performance of ROADMs has been improved by inclusion of dynamic traffic under different traffic models like Bernoulli and Pascal models which depends on traffic peakedness 'Z'. The proposed model is valid for all existing ROADM architectures involved in practical networks and acts as a useful tool for cost-effective network designs. The routing performance is analyzed under different operating conditions of the system like traffic peakedness (Z), number of switches and wavelengths at different stages of the system. © 2012 IEEE.},
note = {0},
keywords = {MATH},
pubstate = {published},
tppubtype = {proceedings}
}
Reconfigurable Optical Add/Drop Multiplexers (ROADMs) are optical modules capable of adding/dropping or passing through any or all wavelengths present in DWDM signal with remote management capability. In performance of ROADMs, routing power 'R' which is a figure of merit has been used. The wavelength routing performance of ROADMs has been improved by inclusion of dynamic traffic under different traffic models like Bernoulli and Pascal models which depends on traffic peakedness 'Z'. The proposed model is valid for all existing ROADM architectures involved in practical networks and acts as a useful tool for cost-effective network designs. The routing performance is analyzed under different operating conditions of the system like traffic peakedness (Z), number of switches and wavelengths at different stages of the system. © 2012 IEEE.
