BOUNDARY MASS-EXCHANGE CONDITIONSIN THE FORM OF THE NEWTONAND 
DALTON LAWS

A. M. Afanas'ev and B. N. Siplivyi

UDC 621.1.016:536.25

It has been established that the linear boundary mass-exchange
conditions in the form of the Newton law are unsuitable for
description of the initial period of drying and the constant-rate
period. The nonlinear boundary conditions of the third kind based
on the Dalton evaporation law have been proposed. A numerical
algorithm for investigation of the temperature and moisture-content
fields up to the dropping-rate period has been developed.

State Educational Institution of Higher Professional Education
"Volgograd State University," 100 Universitetskii Ave., Volgograd,
400062, Russia; email: alkiona111@yandex.ru and perprorector@volsu.ru.
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 1,
pp. 27-34, January-February, 2007. Original article submitted
June 8, 2005; revision submitted May 17, 2006.