Numerical study of the effect of aspect ratio on the entropy generation due to Rayleigh-Benard convection in 2D trapezoidal cavity

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dc.contributor.authorBilal, Sardar
dc.contributor.authorKhan, Noor Zeb
dc.contributor.authorAkgul, Ali
dc.date.accessioned2024-12-24T19:24:41Z
dc.date.available2024-12-24T19:24:41Z
dc.date.issued2024
dc.departmentSiirt Üniversitesi
dc.description.abstractThe investigation of entropic variations in the thermal transport mechanism produced by buoyantly driven temperature gradients has attracted significant attention because of excellent physical significance. Therefore, the prime consent to manipulate the current investigation is to explore the impact of change in the aspect ratio of the trapezoidal cavity in the optimization of the entropy phenomenon. After attaining motivation from its practical essence different entropies including thermal, viscous, and local are estimated. Additionally, global quantities such as average Bejan and Nusselt numbers calculated along with total entropy are measured against flow concerning parameters (aspect ratio (AR), Rayleigh number (Ra) and irreversibility ratio ( phi \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\phi $$\end{document} )). Numerical experiments are performed by implementing a finite element approach using open-source software renowned as COMSOL Multiphysics. Before the accomplishment of the outcomes, confirmation of the numerical technique is assured by establishing grid sensitivity testing. Comparison of results between present and previous studies is also demonstrated. A wide range of involved sundry parameters varying from 10 - 4 <= phi <= 10 - 2 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${10}<^>{-4}\le \phi \le {10}<^>{-2}$$\end{document} , 10 2 <= Ra <= 10 5 and 0.25 <= AR <= 0.75 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${10}<^>{2}\le {\text{Ra}}\le {10}<^>{5} \; {\text{and}} \; 0.25\le {\text{AR}}\le 0.75$$\end{document} are accounted. It is concluded that by escalating the aspect ratio from 0.50 to 0.75, the magnitude of the local entropy enhances from 3370 to 3424. It is revealed that the highest value of viscous entropy that is, 45, is achieved at Ra = 105 and by keeping the aspect ratio of enclosure equal to 0.75, whereas, the thermal entropy approaches 2 for the same situation of parameters. The magnitude of the average Bejan number reaches unity at AR = 0.5 and Ra = 105, whereas for low and high aspect ratios it depicts a magnitude less than 1 for the same Rayleigh number.
dc.description.sponsorshipSiirt University
dc.description.sponsorshipNo Statement Available
dc.identifier.doi10.1007/s10973-024-13180-x
dc.identifier.endpage7134
dc.identifier.issn1388-6150
dc.identifier.issn1588-2926
dc.identifier.issue13
dc.identifier.scopus2-s2.0-85191878222
dc.identifier.scopusqualityQ1
dc.identifier.startpage7121
dc.identifier.urihttps://doi.org/10.1007/s10973-024-13180-x
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6100
dc.identifier.volume149
dc.identifier.wosWOS:001209653200001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.subjectEntropy generation (EG)
dc.subjectTrapezoidal enclosure
dc.subjectAspect ratio
dc.subjectNatural convection
dc.subjectNewtonian fluid
dc.subjectFEM
dc.titleNumerical study of the effect of aspect ratio on the entropy generation due to Rayleigh-Benard convection in 2D trapezoidal cavity
dc.typeArticle

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