Numerical simulation of heat transfer enhancement in wavy microchannel heat sink

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

Research output: Contribution to journalArticle

114 Citations (Scopus)

Abstract

In this paper, heat transfer and water flow characteristics in wavy microchannel heat sink (WMCHS) with rectangular cross-section with various wavy amplitudes ranged from 125 to 500. μm is numerically investigated. This investigation covers Reynolds number in the range of 100 to 1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite-volume method (FVM). The water flow field and heat transfer phenomena inside the heated wavy microchannels is simulated and the results are compared with the straight microchannels. The effect of using a wavy flow channel on the MCHS thermal performance, the pressure drop, the friction factor, and wall shear stress is reported in this article. It is found that the heat transfer performance of the wavy microchannels is much better than the straight microchannels with the same cross-section. The pressure drop penalty of the wavy microchannels is much smaller than the heat transfer enhancement achievement. Both friction factor and wall shear stress are increased proportionally as the amplitude of wavy microchannels increased.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalInternational Communications in Heat and Mass Transfer
Volume38
Issue number1
DOIs
Publication statusPublished - 01 Jan 2011

Fingerprint

heat sinks
Heat sinks
microchannels
Microchannels
heat transfer
Heat transfer
augmentation
Computer simulation
simulation
friction factor
water flow
pressure drop
shear stress
Pressure drop
Shear stress
Friction
Water
finite volume method
cross sections
flow characteristics

All Science Journal Classification (ASJC) codes

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

Cite this

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Numerical simulation of heat transfer enhancement in wavy microchannel heat sink. / Mohammed, H. A.; Gunnasegaran, Prem; Shuaib, N. H.

In: International Communications in Heat and Mass Transfer, Vol. 38, No. 1, 01.01.2011, p. 63-68.

Research output: Contribution to journalArticle

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AB - In this paper, heat transfer and water flow characteristics in wavy microchannel heat sink (WMCHS) with rectangular cross-section with various wavy amplitudes ranged from 125 to 500. μm is numerically investigated. This investigation covers Reynolds number in the range of 100 to 1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite-volume method (FVM). The water flow field and heat transfer phenomena inside the heated wavy microchannels is simulated and the results are compared with the straight microchannels. The effect of using a wavy flow channel on the MCHS thermal performance, the pressure drop, the friction factor, and wall shear stress is reported in this article. It is found that the heat transfer performance of the wavy microchannels is much better than the straight microchannels with the same cross-section. The pressure drop penalty of the wavy microchannels is much smaller than the heat transfer enhancement achievement. Both friction factor and wall shear stress are increased proportionally as the amplitude of wavy microchannels increased.

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