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Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity

Alumina; Aluminum oxide; Entropy; Finite difference method; Isotherms; Nanofluidics; Numerical methods; Thermal conductivity; Entropy generation; Entropy generation analysis; Finite wall thickness; Heat sources; Horizontal walls; Nanofluids; Solid wall; Square cavity; Wall thickness; Water nanofluid...

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Main Authors: Ishak M.S., Alsabery A.I., Chamkha A., Hashim I.
Other Authors: 57208024651
Format: Article
Published: Emerald Publishing 2023
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spelling my.uniten.dspace-255692023-05-29T16:11:03Z Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity Ishak M.S. Alsabery A.I. Chamkha A. Hashim I. 57208024651 56705372300 35568909100 10043682500 Alumina; Aluminum oxide; Entropy; Finite difference method; Isotherms; Nanofluidics; Numerical methods; Thermal conductivity; Entropy generation; Entropy generation analysis; Finite wall thickness; Heat sources; Horizontal walls; Nanofluids; Solid wall; Square cavity; Wall thickness; Water nanofluids; Natural convection Purpose: The purpose of this paper is to study the effects of finite wall thickness on the natural convection and entropy generation in a square cavity filled with Al2O3�water nanofluid in the presence of bottom heat source. Design/methodology/approach: The moving isothermal heater was placed on the bottom solid wall. The vertical walls (left and right walls) were fully maintained at low temperatures. The rest of the bottom solid wall along with the top horizontal wall was kept adiabatic. The boundaries of the domain are assumed to be impermeable; the fluid within the cavity is a water-based nanofluid having Al2O3 nanoparticles. The Boussinesq approximation is applicable. The dimensionless governing equations subject to the selected boundary conditions are solved using the finite difference method. The current proposed numerical method is proven excellent through comparisons with the existing experimental and numerical published studies. Findings: Numerical results were demonstrated graphically in several forms including streamlines, isotherms and local entropy generation, as well as the local and average Nusselt numbers. The results reveal that the thermal conductivity and thickness of the solid wall are important control parameters for optimization of heat transfer and Bejan number within the partially heated square cavity. Originality/value: According to the past research studies mentioned above and to the best of the authors� knowledge, the gap regarding the problem with entropy generation analysis and natural convection in partially heated square cavity has yet to be filled. Because of this, this study aims to investigate the entropy generation analysis as well as the natural convection in nanofluid-filled square cavity which was heated partially. A square cavity with an isothermal heater located on the bottom solid horizontal wall of the cavity and partly cold sidewalls are essential problems in thermal processing applications. Hence, the authors believe that this present work will be a valuable contribution in improving the thermal performance. � 2019, Emerald Publishing Limited. Final 2023-05-29T08:11:02Z 2023-05-29T08:11:02Z 2020 Article 10.1108/HFF-06-2019-0505 2-s2.0-85075942109 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075942109&doi=10.1108%2fHFF-06-2019-0505&partnerID=40&md5=b5389b55b4274b43853d16a9e797641a https://irepository.uniten.edu.my/handle/123456789/25569 30 3 1518 1546 Emerald Publishing Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Alumina; Aluminum oxide; Entropy; Finite difference method; Isotherms; Nanofluidics; Numerical methods; Thermal conductivity; Entropy generation; Entropy generation analysis; Finite wall thickness; Heat sources; Horizontal walls; Nanofluids; Solid wall; Square cavity; Wall thickness; Water nanofluids; Natural convection
author2 57208024651
author_facet 57208024651
Ishak M.S.
Alsabery A.I.
Chamkha A.
Hashim I.
format Article
author Ishak M.S.
Alsabery A.I.
Chamkha A.
Hashim I.
spellingShingle Ishak M.S.
Alsabery A.I.
Chamkha A.
Hashim I.
Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
author_sort Ishak M.S.
title Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
title_short Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
title_full Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
title_fullStr Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
title_full_unstemmed Effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
title_sort effect of finite wall thickness on entropy generation and natural convection in a nanofluid-filled partially heated square cavity
publisher Emerald Publishing
publishDate 2023
_version_ 1806425775105114112
score 13.214268

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