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Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v14.i1.40
pages 65-76

PIV Investigation of the Flow Maldistribution in a Multi-Channel Cold Plate Subject to Inlet Locations

Ming-Xiang Liu
Department of Power Mechanical Engineering, National Tsing Hua University Hsinchu, Taiwan 300
Wen-Jenn Sheu
Department of Power Mechanical Engineering, National Tsing Hua University Hsinchu, Taiwan 300
Song-Bor Chiang
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu City, Taiwan
Chi-Chuan Wang
Department of Mechanical Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan

RESUMO

This study experimentally examines the influence of the inlet locations on the flow distributions of the multi-channel cold plate by means of particle image velocimetry (PIV). Flow visualization for a total of five inlet configurations (namely, U-, I-, J-, L-, and Z-arrangements) are reported in this study. For the U-arrangement, a higher inlet flow rate of the cold plate shows more pronounced maldistribution, and the flow distribution shows three maxima along the channels. The maximum velocity for the J-arrangement occurs at the first few channels from entry. This is attributed to the pressure variation along the inlet and outlet manifold subject to branching and collecting fluid flow. Both J- and Z-arrangements show a detectable flow recirculation at the first few channels, and this phenomenon becomes more pronounced with the rise of inlet flow rate. As a consequence, the pressure drop caused by this considerable recirculation exceeds that of the U-arrangement where the pressure drop is dominated by the impingement flow.


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