Heat transfer in rectangular microchannels heat sink using nanofluids

H. A. Mohammed, Prem Gunnasegaran, N. H. Shuaib

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The effect of using nanofluids on heat transfer and fluid flow characteristics in rectangular shaped microchannel heat sink (MCHS) is numerically investigated for Reynolds number range of 100-1000. In this study, the MCHS performance using alumina-water (Al2O3-H2O) nanofluid with volume fraction ranged from 1% to 5% was used as a coolant is examined. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using finite volume method. The MCHS performance is evaluated in terms of temperature profile, heat transfer coefficient, pressure drop, friction factor, wall shear stress and thermal resistance. The results reveal that when the volume fraction of nanoparticles is increased under the extreme heat flux, both the heat transfer coefficient and wall shear stress are increased while the thermal resistance of the MCHS is decreased. However, nanofluid with volume fraction of 5% could not be able to enhance the heat transfer or performing almost the same result as pure water. Therefore, the presence of nanoparticles could enhance the cooling of MCHS under the extreme heat flux conditions with the optimum value of nanoparticles. Only a slight increase in the pressure drop across the MCHS is found compared with the pure water-cooled MCHS.

Original languageEnglish
Pages (from-to)1496-1503
Number of pages8
JournalInternational Communications in Heat and Mass Transfer
Volume37
Issue number10
DOIs
Publication statusPublished - 01 Dec 2010

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heat sinks
Heat sinks
microchannels
Microchannels
heat transfer
Heat transfer
Volume fraction
thermal resistance
Nanoparticles
pressure drop
heat transfer coefficients
Heat resistance
nanoparticles
Heat transfer coefficients
shear stress
Pressure drop
Water
Heat flux
Shear stress
heat flux

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

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abstract = "The effect of using nanofluids on heat transfer and fluid flow characteristics in rectangular shaped microchannel heat sink (MCHS) is numerically investigated for Reynolds number range of 100-1000. In this study, the MCHS performance using alumina-water (Al2O3-H2O) nanofluid with volume fraction ranged from 1{\%} to 5{\%} was used as a coolant is examined. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using finite volume method. The MCHS performance is evaluated in terms of temperature profile, heat transfer coefficient, pressure drop, friction factor, wall shear stress and thermal resistance. The results reveal that when the volume fraction of nanoparticles is increased under the extreme heat flux, both the heat transfer coefficient and wall shear stress are increased while the thermal resistance of the MCHS is decreased. However, nanofluid with volume fraction of 5{\%} could not be able to enhance the heat transfer or performing almost the same result as pure water. Therefore, the presence of nanoparticles could enhance the cooling of MCHS under the extreme heat flux conditions with the optimum value of nanoparticles. Only a slight increase in the pressure drop across the MCHS is found compared with the pure water-cooled MCHS.",
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Heat transfer in rectangular microchannels heat sink using nanofluids. / Mohammed, H. A.; Gunnasegaran, Prem; Shuaib, N. H.

In: International Communications in Heat and Mass Transfer, Vol. 37, No. 10, 01.12.2010, p. 1496-1503.

Research output: Contribution to journalArticle

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