DEVELOPMENT OF A THEORY AND METHODS FOR CALCULATING THE HEAT 
AND MASS TRANSFER IN DRYING A POROUS BODY WITH MULTICOMPONENT 
VAPOR AND LIQUID PHASES

N. I. Nikitenko, Yu. F. Snezhkin, and N. N. Sorokovaya

UDC 519.6:536.24

Theoretical fundamentals and a numerical method for calculating 
the heat and mass transfer and phase transformations in drying porous 
bodies with multicomponent vapor and liquid phases have been developed. 
We have obtained expressions for the evaporation intensity and the 
phase transition heat of liquid mixture components and a formula for 
the equilibrium partial pressure of vapor phase components, from which, 
as limiting cases, empirical Raoult and Henry laws follow. The results 
of comparison between the calculated and experimental data are presented.

Institute of Engineering Thermal Physics, National Academy of Sciences 
of Ukraine, 2a Zhelyabov Str., Kiev, 03057, Ukraine; email: 
powder@kievwed.com.ua. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 81, No. 6, pp. 1111-1124, November-December, 2008. 
Original article submitted February 23, 2007; revision submitted 
February 28, 2008.