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Pressure drop of He II flow through a porous mediaThe paper reports on measurements of He II pressure drop across two porous SiO2 ceramic filter materials. These materials vary only in porosity, having values of 0.94 and 0.96. The average fiber diameter in both cases is approximately 5 microns. The experiment consists of a glass tube containing a piece of this sponge in one end. The tube is rapidly displaced downward in a bath of helium and the liquid levels are allowed to equilibrate over time producing variable velocities up to 10 cm/sec. The results are compared with those previously obtained using fine mesh screens. Good qualitative agreement is observed for turbulent flow; however, the behavior in the laminar flow regime is not fully understood.
Document ID
19920030717
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Maddocks, J. R.
(Wisconsin Univ. Madison, WI, United States)
Van Sciver, S. W.
(Wisconsin, University Madison, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Engineering (General)
Meeting Information
Meeting: 1989 Cryogenic Engineering Conference
Location: Los Angeles, CA
Country: United States
Start Date: July 24, 1989
End Date: July 28, 1989
Accession Number
92A13341
Funding Number(s)
CONTRACT_GRANT: NAG5-1031
Distribution Limits
Public
Copyright
Other

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