GAS FLOW THROUGH A POROUS HEAT-RELEASING
MEDIUM WITH ALLOWANCE FOR THE TEMPERATURE
DEPENDENCE OF GAS VISCOSITY

V. A. Levin and N. A. Lutsenko

UDC 532.546

The gas flow through a porous heat-releasing medium is 
considered. It has been noted that account for the temperature dependence 
of the gas viscosity strongly influences the solution: the gas flow 
rate markedly decreases and a stronger heating occurs. Analysis of 
the flow of a gas with a temperature-dependent viscosity by the Sutherland 
formula has revealed two steady-state cooling regimes - stable 
and unstable ones. It has been shown that the possibility of the steady-state 
regime is determined not only by the problem parameters but by the 
initial conditions as well. The transient process from the state of 
rest in the absence of heat release to the state of the regime of 
induced filtration upon instantaneous switching-on of heat input is 
described.

Institute of Automatics and Control Processes, Far-East 
Branch of the Russian Academy of Sciences, 5 Radio Str., Vladivostok, 
690041, Russia; email: nickl@inbox.ru. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 79, No. 1, pp. 35-40, January-February, 2006. 
Original article submitted June 11, 2004; revision submitted May 5, 
2005.