INFLUENCE OF THE STATE OF A SURFACE
ON THE FORMATION OF A RAREFIED GAS
FLOW IN A CHANNEL 
O. V. Sazhin and S. F. Borisov

UDC 533.722:541.183.5

The results of experimental investigation of free-molecular 
gas flow in channels with an atomically pure and adsorbed surface 
are presented. The data obtained made it possible to formulate the 
basic principles which reflect the character of the effect of the 
chemical composition of a surface on the gas-dynamic conductivity 
of the channel. Qualitative interpretation of the obtained experimental 
results is given within the framework of the existing formalism in 
the description of the scattering of molecular beams by the surface 
of a solid body. The diffusion factors <$E epsilon> have been calculated 
for different surfaces and gases from experimental data. Satisfactory 
agreement between numerical simulation by the Monte Carlo method and 
the experimental data is seen.

Ural State University, Ekaterinburg, Russia; email: oleg.sazhin@usu.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 5, 
pp. 131-135, September-October, 2001. 
Original article submitted March 27, 2001.


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