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Micromachines 2017, 8(2), 54; doi:10.3390/mi8020054

Performance Analysis of Double-Layer Microchannel Heat Sinks under Non-Uniform Heating Conditions with Random Hotspots

Department of Mechanical Engineering, Inha University 100, Inha-Ro, Nam-Gu, Incheon 22212, Korea
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Author to whom correspondence should be addressed.
Academic Editors: Yongxin Song, Junsheng Wang, Dongqing Li and Nam-Trung Nguyen
Received: 24 December 2016 / Revised: 20 January 2017 / Accepted: 7 February 2017 / Published: 14 February 2017
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Abstract

Performance analysis of double-layer microchannel heat sinks was performed under non-uniform heating conditions having randomly distributed hotspots. Two parallel-channel (parallel-flow and counter-flow) and one cross-channel (transverse-flow) designs of double-layer heat sink were evaluated with three sets of heating schemes. Each set of heating scheme consisted of eleven randomly distributed hotspots generated by Latin hypercube sampling. The heat flux, area, and location of the hotspots were selected as the design parameters. Conjugate heat transfer analysis of the heat sinks was performed by solving three-dimensional Navier–Stokes and energy equations. Water with temperature-dependent properties was selected as the coolant. The thermal resistance, pressure drop, maximum temperature rise, and temperature variation among hotspots were evaluated for all the heat sinks. The transverse-flow microchannel heat sink exhibited the lowest thermal resistance, temperature rise and temperature variation among the hotspots throughout the specified range of flow rate. The lowest pressure drop was exhibited by the counter-flow heat sink. View Full-Text
Keywords: electronic cooling; double-layer microchannel heat sink; random hotspots; transverse-flow; Latin hypercube sampling electronic cooling; double-layer microchannel heat sink; random hotspots; transverse-flow; Latin hypercube sampling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ansari, D.; Kim, K.-Y. Performance Analysis of Double-Layer Microchannel Heat Sinks under Non-Uniform Heating Conditions with Random Hotspots. Micromachines 2017, 8, 54.

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