1.
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.
2.
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.
3.
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.
4.
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
5.
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.