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Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids

A new micro heat exchanger was analyzed using numerical formulation of conjugate heat transfer for single-phase fluid flow across copper microchannels. The flow across bent channels harnesses asymmetric laminar flow and dean vortices phenomena for heat transfer enhancement. The single-channel analys...

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Autores principales: Khan, Muhammad Zia Ullah, Uddin, Emad, Akbar, Bilal, Akram, Naveed, Naqvi, Ali Ammar, Sajid, Muhammad, Ali, Zaib, Younis, Md. Yamin, García Márquez, Fausto Pedro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559271/
https://www.ncbi.nlm.nih.gov/pubmed/32916991
http://dx.doi.org/10.3390/nano10091796
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author Khan, Muhammad Zia Ullah
Uddin, Emad
Akbar, Bilal
Akram, Naveed
Naqvi, Ali Ammar
Sajid, Muhammad
Ali, Zaib
Younis, Md. Yamin
García Márquez, Fausto Pedro
author_facet Khan, Muhammad Zia Ullah
Uddin, Emad
Akbar, Bilal
Akram, Naveed
Naqvi, Ali Ammar
Sajid, Muhammad
Ali, Zaib
Younis, Md. Yamin
García Márquez, Fausto Pedro
author_sort Khan, Muhammad Zia Ullah
collection PubMed
description A new micro heat exchanger was analyzed using numerical formulation of conjugate heat transfer for single-phase fluid flow across copper microchannels. The flow across bent channels harnesses asymmetric laminar flow and dean vortices phenomena for heat transfer enhancement. The single-channel analysis was performed to select the bent channel aspect ratio by varying width and height between 35–300 μm for Reynolds number and base temperature magnitude range of 100–1000 and 320–370 K, respectively. The bent channel results demonstrate dean vortices phenomenon at the bend for Reynolds number of 500 and above. Thermal performance factor analysis shows an increase of 18% in comparison to straight channels of 200 μm width and height. Alumina nanoparticles at 1% and 3% concentration enhance the Nusselt number by an average of 10.4% and 23.7%, respectively, whereas zirconia enhances Nusselt number by 16% and 33.9% for same concentrations. On the other hand, thermal performance factor analysis shows a significant increase in pressure drop at high Reynolds number with 3% particle concentration. Using zirconia for nanofluid, Nusselt number of the bent multi-channel model is improved by an average of 18% for a 3% particle concentration as compared to bent channel with deionized water.
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spelling pubmed-75592712020-10-29 Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids Khan, Muhammad Zia Ullah Uddin, Emad Akbar, Bilal Akram, Naveed Naqvi, Ali Ammar Sajid, Muhammad Ali, Zaib Younis, Md. Yamin García Márquez, Fausto Pedro Nanomaterials (Basel) Article A new micro heat exchanger was analyzed using numerical formulation of conjugate heat transfer for single-phase fluid flow across copper microchannels. The flow across bent channels harnesses asymmetric laminar flow and dean vortices phenomena for heat transfer enhancement. The single-channel analysis was performed to select the bent channel aspect ratio by varying width and height between 35–300 μm for Reynolds number and base temperature magnitude range of 100–1000 and 320–370 K, respectively. The bent channel results demonstrate dean vortices phenomenon at the bend for Reynolds number of 500 and above. Thermal performance factor analysis shows an increase of 18% in comparison to straight channels of 200 μm width and height. Alumina nanoparticles at 1% and 3% concentration enhance the Nusselt number by an average of 10.4% and 23.7%, respectively, whereas zirconia enhances Nusselt number by 16% and 33.9% for same concentrations. On the other hand, thermal performance factor analysis shows a significant increase in pressure drop at high Reynolds number with 3% particle concentration. Using zirconia for nanofluid, Nusselt number of the bent multi-channel model is improved by an average of 18% for a 3% particle concentration as compared to bent channel with deionized water. MDPI 2020-09-09 /pmc/articles/PMC7559271/ /pubmed/32916991 http://dx.doi.org/10.3390/nano10091796 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Khan, Muhammad Zia Ullah
Uddin, Emad
Akbar, Bilal
Akram, Naveed
Naqvi, Ali Ammar
Sajid, Muhammad
Ali, Zaib
Younis, Md. Yamin
García Márquez, Fausto Pedro
Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title_full Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title_fullStr Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title_full_unstemmed Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title_short Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al(2)O(3) and ZrO(2) Nanofluids
title_sort investigation of heat transfer and pressure drop in microchannel heat sink using al(2)o(3) and zro(2) nanofluids
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559271/
https://www.ncbi.nlm.nih.gov/pubmed/32916991
http://dx.doi.org/10.3390/nano10091796
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