Nusselt Number and Friction Factor of Staggered Arrays of Low Aspect Ratio Micropin-Fins Under Cross Flow for Water as Fluid-Reference-Cited by-同舟云学术

Nusselt Number and Friction Factor of Staggered Arrays of Low Aspect Ratio Micropin-Fins Under Cross Flow for Water as Fluid

Published:2006-04-13 Issue:2 Volume:129 Page:141-153
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Prasher Ravi S.¹,Dirner John²,Chang Je-Young²,Myers Alan²,Chau David²,He Dongming²,Prstic Suzana²

Affiliation:

1. Intel Corporation, CH5-157, 5000 W. Chandler Blvd., Chandler, AZ 85226 and Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287

2. Intel Corporation, CH5-157, 5000 W. Chandler Blvd., Chandler, AZ 85226

Abstract

Experimental results of the thermal and hydraulic performances of silicon-based, low aspect ratio micropin-fin cold plates under cross flow conditions are reported. The pins were both circular and square in shape with dimensions (diameter for circular and sides for square) ranging from 50μm to 150μm. The test chip contained 20 integral 75×75μm temperature sensors which were used to determine the thermal resistance (KW−1) of the cold plates. The experiments were conducted using water, over a Reynolds number (Re) ranging from 40 to 1000. The data show that the average Nusselt number (Nu) based on the fin diameter varies as Re0.84 for Re<100 and as Re0.73 for Re>100, where Re is the Reynolds number based on maximum velocity and the fin diameter. Analysis of the Fanning friction factor (f) data shows that f varies as Re−1.35 for Re<100 and as Re−0.1 for Re>100.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/129/2/141/5633580/141_1.pdf

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