Characterizing He II flow through porous materials using counterflow dataAn empirical extension of the two-fluid model is used to characterize He II flow through porous materials. It is shown that four empirical parameters are necessary to describe the pressure and temperature differences induced by He II flow through a porous sample. The three parameters required to determine pressure differences are measured in counterflow and found to compare favorably with those for isothermal flow. The fourth parameter, the Gorter-Mellink constant, differs substantially from smooth tube values. It is concluded that parameter values determined from counterflow can be used to predict pressure and temperature differences in a variety of flows to an accuracy of about +/- 20 percent.
Document ID
19930064584
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Maddocks, J. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Van Sciver, S. W. (Wisconsin Univ. Madison, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Advances in cryogenic engineering. Vol. 37A - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991 (A93-48578 20-37)
Publisher: Plenum Press
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A48581
Funding Number(s)
CONTRACT_GRANT: NAG5-1031
Distribution Limits
Public
Copyright
Other
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Related Records
IDRelationTitle19930064581Collected WorksAdvances in cryogenic engineering. Vols. 37A & 37B - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991