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Science 22 December 1989:
Vol. 246. no. 4937, pp. 1591 - 1593
DOI: 10.1126/science.246.4937.1591
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Articles

Thermomolecular Pressure in Surface Melting: Motivation for Frost Heave

J. G. DASH 1

1 Department of Physics, FM-15, University of Washington, Seattle, WA 98195.

A thermomolecular pressure is associated with surface melting, and it can drive mass flow along an interface under a lateral temperature gradient. The pressure is a universal thermodynamic function in the limit of thick films. It may be responsible for frost heave in frozen ground.

Submitted on August 4, 1989
Accepted on October 13, 1989

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Science. ISSN 0036-8075 (print), 1095-9203 (online)