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Thermal Contact Domain Resistance: Overall Solid Helium 4 Kapitza Resistance
Research and Development Division
Lockheed Missiles and Space Co.
Palo Alto, CA 94304
University of California, Los Angeles
Chemical Engineering Dept.
Los Angeles, CA 90024, U.S.A.
Thomas C. Chuang,
DuPont Xerox Imaging Co.
Lionville, PA 19353
The thermal contact resistance found by Kapitza in superfluid Helium (He II), is now known to be a special case within a large family of contact resistances. Many puzzles arising in the early development of a data base for heat exchanger surface sizing have been a challenge to various researchers. In the present work progress in the 1980's is assessed with the specific goal of evaluation of the overall phonon transmission coefficient associated with solid-liquid Helium-4 Kapitza resistance. The evaluation includes intermediate and high heat flux ranges, and a major emphasis in on Cu-surfaces of heat exchangers, preferably used as superconducting stabilizers in magnets and other devices. It is found that fluid dynamic effects, induced by geometric arrangements, may have an influence, however the base values of the overall phonon transmission coefficient are maintained in a rather narrow range, compared to the possible total range known for impurity domains and passivated surface domains.
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About the author- Dr. Sidney Yuan is a consultant in the field of Low Temperature Physics and Cryogenics, and has written a Book on Cryogenics and published extensively in the field. E-Mail.
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