Heat and mass transfer during the drying of moist materials

Abstract

This paper deals with heat and mass transfer inside a moist capillary porous body under conditions of an intensive heating process. It was found by the experiments that in the capillaries of a body a pressure of gas and vapour mixture occurs exceeding that of the surrounding air (barometric pressure). One of the main reasons stimulating moisture transfer inside a body in the process of drying is a decrease of this excessive pressure. The coefficients of moisture content are calculated and in analysis the mechanism of drying is given on the basis of the differential equation for heat and mass transfer in dispersed media.