Gas Transport in Porous Media: Simulations and Experiments on Partially Densified Aerogels

Details Gas Transport in Porous Media: Simulations and Experiments on Partially Densified Aerogels Gas Transport in Porous Media: Simulations and Experiments on Partially Densified Aerogels

1995-04-11

arxiv.org/abs/cond-mat/9504043v1

Physics

Condensed Matter

RevTex, 11 pages + 5 postscript figures appended using "uufiles". Published in Europhys. Lett. 29, p. 567 (1995)

Scientific paper

10.1209/0295-5075/29/7/010

The experimental density dependence of gas (argon and nitrogen) permeability of partially densified silica aerogels in the Knudsen regime is quantitatively accounted for by a computer model. The model simulates both the structure of the sintered material and the random ballistic motion of a point particle inside its voids. The same model is also able to account for the densit y dependence of the specific pore surface as measured from nitrogen adsorption experiments.

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