ESCAPE OF A RAREFIED GAS INTO
VACUUM THROUGH A NONHOMOGENEOUS POROUS LAYER
E. Brovermana, N. V. Pavlyukevichb,
S. Rozina, and Y. Ronena

UDC 533.7:536.423

Mass transfer in filtration or evaporation of a substance 
from a deepened surface in a highly porous layer and in escape into 
vacuum is calculated based on the Monte Carlo method. It is assumed 
that the porous layer contains individual inclusions in which the 
porosity is a random quantity. Account is taken of the possibility 
of the gas molecules being absorbed on the surface of the particles 
of the porous body. The angular distributions of molecules emerging 
from the layer are obtained. The nonmonotonic character of the distribution 
of the molecules absorbed which is caused by the presence of the inclusions 
is revealed.

aBen-Gurion University, Be'er Sheva, Israel; 
bAcademic Scientific Complex "A. V. Luikov Heat and Mass 
Transfer Institute," National Academy of Sciences of Belarus, Minsk, Belarus.
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 6, pp. 88-93, 
November-December, 2001. Original article submitted December 27, 2000.

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