The Minimum Meniscus Radius and Capillary Heat Transport Limit in Micro Heat Pipes

[+] Author and Article Information
H. B. Ma, G. P. Peterson

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Heat Transfer 120(1), 227-233 (Feb 01, 1998) (7 pages) doi:10.1115/1.2830046 History: Received July 21, 1997; Revised November 20, 1997; Online January 07, 2008


Based on the momentum conservation and Laplace-Young equations, an analytical expression for the minimum meniscus radius was derived and an expression for the maximum capillary heat transport limit in micro/small heat pipes was obtained. These expressions incorporated the shear stresses at the liquid/solid and liquid/vapor interfaces, contact angle effects, vapor pressure drop, tilt angle, groove dimensions, and channel angle effects. In order to verify the expressions derived herein, comparisons with experimental data from triangular grooves and micro heat pipes were made; they demonstrated that these equations can be used to predict the maximum capillary heat transport in the micro/small triangular grooves or micro heat pipes with a higher degree of accuracy, and they can explain the behavior better than previously developed models.

Copyright © 1998 by The American Society of Mechanical Engineers
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