A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles

Micro-gap heat sinks can be used for extensive evaporative cooling of micro-electronic devices, micro-electro-mechanical systems (MEMS) and micro-opto-elecro-mechanical systems (MOEMS). Internal micro-fins may increase two-phase heat transfer rate by extending surface area. However, excessive pressu...

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Main Authors:	Ahmed, Shugata, Ismail, Ahmad Faris, Sulaeman, Erwin, Hasan, Muhammad Hasibul
Format:	Article
Language:	English English
Published:	Research India Publications 2016
Subjects:	TJ163.13 Power resources TJ163.26 Energy conservation
Online Access:	http://irep.iium.edu.my/51344/ http://irep.iium.edu.my/51344/ http://irep.iium.edu.my/51344/1/ijaerv11n4_35.pdf http://irep.iium.edu.my/51344/4/51344_A_comparative_analysis_of_flow_boiling_in_micro-gaps_with_internal_micro-fins_of_rectangular_and_triangular_profiles_SCOPUS.pdf

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spelling	iium-513442017-03-24T01:15:03Z http://irep.iium.edu.my/51344/ A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles Ahmed, Shugata Ismail, Ahmad Faris Sulaeman, Erwin Hasan, Muhammad Hasibul TJ163.13 Power resources TJ163.26 Energy conservation Micro-gap heat sinks can be used for extensive evaporative cooling of micro-electronic devices, micro-electro-mechanical systems (MEMS) and micro-opto-elecro-mechanical systems (MOEMS). Internal micro-fins may increase two-phase heat transfer rate by extending surface area. However, excessive pressure drop is one of the significant drawbacks of two-phase cooling. Fin shapes play an imperative role in flow boiling heat transfer rate and pressure drop penalty. The scope of this paper is to estimate two-phase heat and mass transfer, pressure drop, wall shear stress development and turbulent characteristics of micro-gaps with rectangular and triangular micro-fins by numerical simulation using water coolant. Simulation has been carried out by FLUENT 14.5 release. Volume of fluid (VOF) model along with Renormalization Group Theory (RNG) k-ɛ turbulence model has been used for fluid flow and heat transfer modeling. Governing equations have been solved numerically by Finite Volume Method (FVM). Simulation results demonstrate that thermal resistance of triangular fin micro-gap is higher than rectangular fin heat sink. Thermal resistance declines with pumping power increment. However, for both of the heat sinks, decrement rate drops-off after 0.004 W pumping power. In comparison to triangular fin micro-gap, turbulent kinetic energy generation is found higher for rectangular fin heat sink. Although rectangular fin micro-gap shows superior heat transfer performance, pressure drop penalty is also larger than triangular fin micro-gap. Hence, it is recommended that pressure drop should be minimized by optimizing geometrical parameters and boundary conditions. Research India Publications 2016 Article PeerReviewed application/pdf en http://irep.iium.edu.my/51344/1/ijaerv11n4_35.pdf application/pdf en http://irep.iium.edu.my/51344/4/51344_A_comparative_analysis_of_flow_boiling_in_micro-gaps_with_internal_micro-fins_of_rectangular_and_triangular_profiles_SCOPUS.pdf Ahmed, Shugata and Ismail, Ahmad Faris and Sulaeman, Erwin and Hasan, Muhammad Hasibul (2016) A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles. International Journal of Applied Engineering Research, 11 (4). pp. 2364-2372. ISSN 0973-4562 http://www.ripublication.com/ijaer16/ijaerv11n4_35.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TJ163.13 Power resources TJ163.26 Energy conservation
spellingShingle	TJ163.13 Power resources TJ163.26 Energy conservation Ahmed, Shugata Ismail, Ahmad Faris Sulaeman, Erwin Hasan, Muhammad Hasibul A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
description	Micro-gap heat sinks can be used for extensive evaporative cooling of micro-electronic devices, micro-electro-mechanical systems (MEMS) and micro-opto-elecro-mechanical systems (MOEMS). Internal micro-fins may increase two-phase heat transfer rate by extending surface area. However, excessive pressure drop is one of the significant drawbacks of two-phase cooling. Fin shapes play an imperative role in flow boiling heat transfer rate and pressure drop penalty. The scope of this paper is to estimate two-phase heat and mass transfer, pressure drop, wall shear stress development and turbulent characteristics of micro-gaps with rectangular and triangular micro-fins by numerical simulation using water coolant. Simulation has been carried out by FLUENT 14.5 release. Volume of fluid (VOF) model along with Renormalization Group Theory (RNG) k-ɛ turbulence model has been used for fluid flow and heat transfer modeling. Governing equations have been solved numerically by Finite Volume Method (FVM). Simulation results demonstrate that thermal resistance of triangular fin micro-gap is higher than rectangular fin heat sink. Thermal resistance declines with pumping power increment. However, for both of the heat sinks, decrement rate drops-off after 0.004 W pumping power. In comparison to triangular fin micro-gap, turbulent kinetic energy generation is found higher for rectangular fin heat sink. Although rectangular fin micro-gap shows superior heat transfer performance, pressure drop penalty is also larger than triangular fin micro-gap. Hence, it is recommended that pressure drop should be minimized by optimizing geometrical parameters and boundary conditions.
format	Article
author	Ahmed, Shugata Ismail, Ahmad Faris Sulaeman, Erwin Hasan, Muhammad Hasibul
author_facet	Ahmed, Shugata Ismail, Ahmad Faris Sulaeman, Erwin Hasan, Muhammad Hasibul
author_sort	Ahmed, Shugata
title	A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
title_short	A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
title_full	A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
title_fullStr	A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
title_full_unstemmed	A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
title_sort	comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles
publisher	Research India Publications
publishDate	2016
url	http://irep.iium.edu.my/51344/ http://irep.iium.edu.my/51344/ http://irep.iium.edu.my/51344/1/ijaerv11n4_35.pdf http://irep.iium.edu.my/51344/4/51344_A_comparative_analysis_of_flow_boiling_in_micro-gaps_with_internal_micro-fins_of_rectangular_and_triangular_profiles_SCOPUS.pdf
first_indexed	2023-09-18T21:12:40Z
last_indexed	2023-09-18T21:12:40Z
_version_	1777411356697296896

A comparative analysis of flow boiling in micro-gaps with internal micro-fins of rectangular and triangular profiles

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