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Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions

Air; Air intakes; Evaporation; Evaporative cooling systems; Film cooling; Heat exchangers; Numerical methods; Nusselt number; Porous materials; Cooling tower fill; Evaporative cooling; Falling film; Falling film on tube; Fluid films; Heat transfer of fluid film; Horizontal-tube; Multi shapes; Multi-...

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Main Authors: Mohd Amir F., Yusoff M.Z., Abu Hassan S.H.
Other Authors: 57345211100
Format: Article
Published: Elsevier Ltd 2023
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spelling my.uniten.dspace-266692023-05-29T17:36:08Z Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions Mohd Amir F. Yusoff M.Z. Abu Hassan S.H. 57345211100 7003976733 57222529972 Air; Air intakes; Evaporation; Evaporative cooling systems; Film cooling; Heat exchangers; Numerical methods; Nusselt number; Porous materials; Cooling tower fill; Evaporative cooling; Falling film; Falling film on tube; Fluid films; Heat transfer of fluid film; Horizontal-tube; Multi shapes; Multi-geometry; Non-circular; Non-circular cylinder; Volume of fluids; Circular cylinders The cooling of the fluid film on non-circular surfaces under cross-flow of air is investigated. The heat transfer mechanism and characteristics in enclosed space are not satisfactorily available and well understood. The multi-faceted surface is introduced to simulate the various surface prevalent in heat exchangers, such as the porous media and evaporator. The volume of fluid (VOF) method is used in the numerical investigation with a variation of liquid load to acquire the effect of the liquid to gas (L/G) ratio. The gap between the cross-flow air inlet and the fluid film is constant, but the fluid film surface is the main focus. The relatively larger gap between the air inlet and the fluid film surface results in the Qsensible dominating the heat transfer mechanism. Although the higher fluid film thickness does not improve the heat transfer, its effect is more significant than the dimensionless interfacial velocity, VI*, which is relatively higher on the multi-faceted surface. The Nusselt number is significantly higher on the multi-faceted surface. However, the multi-faceted surface generates flow separations and impairs the interfacial heat transfer. In addition, the Nusselt number is found to be bidirectional on the multi-faceted surface. � 2022 Elsevier Ltd Final 2023-05-29T09:36:08Z 2023-05-29T09:36:08Z 2022 Article 10.1016/j.ijheatmasstransfer.2022.123363 2-s2.0-85136254521 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136254521&doi=10.1016%2fj.ijheatmasstransfer.2022.123363&partnerID=40&md5=860f38191cde9c7666040e33921981db https://irepository.uniten.edu.my/handle/123456789/26669 197 123363 Elsevier Ltd 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 Air; Air intakes; Evaporation; Evaporative cooling systems; Film cooling; Heat exchangers; Numerical methods; Nusselt number; Porous materials; Cooling tower fill; Evaporative cooling; Falling film; Falling film on tube; Fluid films; Heat transfer of fluid film; Horizontal-tube; Multi shapes; Multi-geometry; Non-circular; Non-circular cylinder; Volume of fluids; Circular cylinders
author2 57345211100
author_facet 57345211100
Mohd Amir F.
Yusoff M.Z.
Abu Hassan S.H.
format Article
author Mohd Amir F.
Yusoff M.Z.
Abu Hassan S.H.
spellingShingle Mohd Amir F.
Yusoff M.Z.
Abu Hassan S.H.
Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
author_sort Mohd Amir F.
title Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
title_short Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
title_full Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
title_fullStr Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
title_full_unstemmed Heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
title_sort heat transfer mechanism and characteristics of fluid film on multi-faceted surface under constant cross-flow conditions
publisher Elsevier Ltd
publishDate 2023
_version_ 1806426333663723520
score 13.211869

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