Mixed Convective Heat Transfer From a Simulated Microchip to Liquid Flows in a Horizontal Rectangular Channel

[+] Author and Article Information
Y. Chin, C. F. Ma, X. Q. Gu, L. Xu

Institute of Thermal Science & Energy Conservation, Beijing Polytechnic University, Beijing 100022, People’s Republic of China

J. Electron. Packag 113(3), 309-312 (Sep 01, 1991) (4 pages) doi:10.1115/1.2905411 History: Received February 28, 1990; Revised March 30, 1991; Online April 28, 2008


Mixed convection from a small heater (5mm × 5mm) to liquid flows in a horizontal rectangular channel is investigated experimentally. The results of three cases in which the buoyancy is normal to the liquid flow directions — hot surface facing upward, facing downward and vertically attached to one wall of the channel — are presented. Correlations are also provided to predict the mixed convective effects in the range 100 < ReL < 4000. The results demonstrated that both the Reynolds number ReL and the modified Rayleigh number RaL * pronouncedly dominate the heat transfer process. In all of the above cases, heat transfer was enhanced over that of forced convection.

Copyright © 1991 by The American Society of Mechanical Engineers
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