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Heat and mass transfer in porous media phase separation at temperatures below the lambda-point of He-4Newtonian fluid motion, coupled to heat transfer via latent heat of phase transition, is well known from numerous studies of condensation and boiling. Considerably less knowledge is available for vapor-liquid phase separation in the absence of gravity effect on the transport phenomena. The present studies are focused on heat and mass transfer associated with vapor-liquid phase separation required for long-term storage of the cryogen liquid He II in space vessels. Though space conditions are the dominant mode of interest in advanced equipment, e.g. IR telescopes, the systems may be operated in principle during terrestrial conditions. The latter are considered in the present work. It emphasizes the linear regime including an extrapolation based on variable thermophysical properties. Data taken with a phase separation approach show departures from the linear regime prediction. They agree with a transport equation proposed for the nonlinear, turbulent regime.
Document ID
19870043455
Document Type
Conference Paper
Authors
Yuan, S. W. K. (California Univ. Los Angeles, CA, United States)
Frederking, T. H. K. (California, University Los Angeles, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Funding Number(s)
CONTRACT_GRANT: NSF CPE-81-5153
CONTRACT_GRANT: NCC2-64
Distribution Limits
Public
Copyright
Other