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Evaluation of Various Channel Shapes of a Microchannel Heat Sink

Aatif Ali Khan

Department of Mechanical Engineering, Inha University, Yonghyun-Dong, Nam-Gu Incheon, Republic of Korea

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and

Kwang-Yong Kim

Department of Mechanical Engineering, Inha University, Yonghyun-Dong, Nam-Gu Incheon, Republic of Korea

E-mail Address: kykim@inha.ac.kr

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https://doi.org/10.1142/S2010132516500188Cited by:16 (Source: Crossref)

Abstract

Thermal and hydraulic performances of various geometric shapes of a microchannel heat sink were evaluated numerically using Navier–Stokes equations. A heat sink comprised of a $1 \times 1$ $1 \times 1$ cm² silicon wafer was investigated with water as the cooling fluid. The performances of seven microchannel shapes were compared at the same microchannel hydraulic diameter and the same average height of the bottom silicon substrate. The thermal resistance, friction coefficient, and Nusselt number were calculated for a Reynolds number range of 50 to 500. The results show that an inverse trapezoidal shape gives the lowest thermal resistance for a Reynolds number up to 300. The values of $f$ $f$ Re are almost similar for all the shapes because of the constant hydraulic diameter.

Keywords:

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