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Slip effects associated with Knudsen transport phenomena in porous media (1988)

Khandhar, P. K. ; Frederking, T. H. K. ; Hepler, W. A.

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Publication Date: 2019-04-02

Description: Porous media used in phase separators and thermomechanical pumps have been the subject of characterization efforts based on the Darcy permeability of laminar continuum flow. The latter is not always observed at low speed, in particular at permeabilities below 10 to the -9th/squared cm. The present experimental and theoretical studies address questions of slip effects associated with long mean free paths of gas flow at room temperature. Data obtained are in good agreement, within data uncertainty, with a simplified asymptotic Knudsen equation proposed for porous plugs on the basis of Knudsen's classical flow equation for long mean free paths.

Keywords: FLUID MECHANICS AND HEAT TRANSFER

Type: Cryogenics (ISSN 0011-2275); 28; 110-114

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