The Effect of Coatings on the Steady-State and Short Time Constriction Resistance for an Arbitrary Axisymmetric Flux

[+] Author and Article Information
J. R. Dryden

The University of Western Ontario, London, CANADA, NGA 5B9

M. M. Yovanovich

University of Waterloo, Department of Mechanical Engineering, Waterloo, CANADA

A. S. Deakin

The University of Western Ontario, Department of Applied Mathematics, London, CANADA

J. Heat Transfer 107(1), 33-38 (Feb 01, 1985) (6 pages) doi:10.1115/1.3247398 History: Received September 29, 1984; Online October 20, 2009


The effect of a coating upon the short-time and steady-state constriction resistance is analyzed for an arbitrary axisymmetric contact spot flux. At very short times the expression obtained for R is identical to the expression for one-dimensional transient heat flow through a two-layer wall. At steady-state, the results of the analysis predict that the effect of the coating are mainly dependent on the relative thermal properties of the coating and substrate. The limiting cases, where the coating thickness approaches either zero or infinity, are discussed.

Copyright © 1985 by ASME
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