Mixed Double-Diffusive Convection in Gas-Loaded Heat Pipes

[+] Author and Article Information
P. F. Peterson

Department of Nuclear Engineering, University of California, Berkeley, CA 94720

C. L. Tien

Department of Mechanical Engineering, University of California, Irvine, CA 92717

J. Heat Transfer 112(1), 78-83 (Feb 01, 1990) (6 pages) doi:10.1115/1.2910368 History: Received November 14, 1988; Online May 23, 2008


This study examines mixed double-diffusive convection in gas-loaded heat pipes and two-phase thermosyphons. The numerical simulation and experiments show that steady, laminar natural convection due to the combined effects of temperature and concentration gradients can greatly redistribute the noncondensable gas within the condenser. This change of the gas distribution, however, does not significantly alter the overall condensation heat transfer. This interesting result implies that even with natural convection present, much simpler integral models can still be applied with confidence for the design of variable-conductance heat pipes and thermosyphons.

Copyright © 1990 by The American Society of Mechanical Engineers
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