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Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels

The foremost focus of this article was to investigate the entropy generation in hydromagnetic flow of generalized Newtonian Carreau nanofluid through a converging and diverging channel. In addition, a heat transport analysis was performed for Carreau nanofluid using the Buongiorno model in the prese...

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Autores principales: Rehman, Sohail, Hashim, Nasr, Abdelaziz, Eldin, Sayed M., Malik, Muhammad Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9610660/
https://www.ncbi.nlm.nih.gov/pubmed/36296108
http://dx.doi.org/10.3390/mi13101755
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author Rehman, Sohail
Hashim,
Nasr, Abdelaziz
Eldin, Sayed M.
Malik, Muhammad Y.
author_facet Rehman, Sohail
Hashim,
Nasr, Abdelaziz
Eldin, Sayed M.
Malik, Muhammad Y.
author_sort Rehman, Sohail
collection PubMed
description The foremost focus of this article was to investigate the entropy generation in hydromagnetic flow of generalized Newtonian Carreau nanofluid through a converging and diverging channel. In addition, a heat transport analysis was performed for Carreau nanofluid using the Buongiorno model in the presence of viscous dissipation and Joule heating. The second law of thermodynamics was employed to model the governing flow transport along with entropy generation arising within the system. Entropy optimization analysis is accentuated as its minimization is the best measure to enhance the efficiency of thermal systems. This irreversibility computation and optimization were carried out in the dimensional form to obtain a better picture of the system’s entropy generation. With the help of proper dimensionless transformations, the modeled flow equations were converted into a system of non-linear ordinary differential equations. The numerical solutions were derived using an efficient numerical method, the Runge–Kutta Fehlberg method in conjunction with the shooting technique. The computed results were presented graphically through different profiles of velocity, temperature, concentration, entropy production, and Bejan number. From the acquired results, we perceive that entropy generation is augmented with higher Brinkman and Reynolds numbers. It is significant to mention that the system’s entropy production grew near its two walls, where the irreversibility of heat transfer predominates, in contrast to the channel’s center, where the irreversibility of frictional force predominates. These results serve as a valuable guide for designing and optimizing channels with diverging–converging profiles required in several heat-transfer applications.
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spelling pubmed-96106602022-10-28 Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels Rehman, Sohail Hashim, Nasr, Abdelaziz Eldin, Sayed M. Malik, Muhammad Y. Micromachines (Basel) Article The foremost focus of this article was to investigate the entropy generation in hydromagnetic flow of generalized Newtonian Carreau nanofluid through a converging and diverging channel. In addition, a heat transport analysis was performed for Carreau nanofluid using the Buongiorno model in the presence of viscous dissipation and Joule heating. The second law of thermodynamics was employed to model the governing flow transport along with entropy generation arising within the system. Entropy optimization analysis is accentuated as its minimization is the best measure to enhance the efficiency of thermal systems. This irreversibility computation and optimization were carried out in the dimensional form to obtain a better picture of the system’s entropy generation. With the help of proper dimensionless transformations, the modeled flow equations were converted into a system of non-linear ordinary differential equations. The numerical solutions were derived using an efficient numerical method, the Runge–Kutta Fehlberg method in conjunction with the shooting technique. The computed results were presented graphically through different profiles of velocity, temperature, concentration, entropy production, and Bejan number. From the acquired results, we perceive that entropy generation is augmented with higher Brinkman and Reynolds numbers. It is significant to mention that the system’s entropy production grew near its two walls, where the irreversibility of heat transfer predominates, in contrast to the channel’s center, where the irreversibility of frictional force predominates. These results serve as a valuable guide for designing and optimizing channels with diverging–converging profiles required in several heat-transfer applications. MDPI 2022-10-17 /pmc/articles/PMC9610660/ /pubmed/36296108 http://dx.doi.org/10.3390/mi13101755 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rehman, Sohail
Hashim,
Nasr, Abdelaziz
Eldin, Sayed M.
Malik, Muhammad Y.
Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title_full Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title_fullStr Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title_full_unstemmed Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title_short Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels
title_sort entropy minimization for generalized newtonian fluid flow between converging and diverging channels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9610660/
https://www.ncbi.nlm.nih.gov/pubmed/36296108
http://dx.doi.org/10.3390/mi13101755
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