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)