Computer modelling of nonisothermal transfer of moisture during drying of wood with the use of the computing environment mathcad

Abstract

This study explores the features of process of drying internal heat and mass transfer in wood in the conditions of essentially noniso-thermal transfer of moisture. The process of capillary conductivity of wood is analyzed on the model of colloidal capillary-porous solid. The density of moisture flows caused by the phenomenon of thermal and hydraulic conductivity is determined. Previously experimentally established fact of influence on the process of moisture removal of the current moisture content of wood is analytically confirmed. De-pendences of the phase transition criterion taking into account the direction of the temperature gradient and wood moisture are analytically obtained. Recommendations are given to determine the thermogradient coefficient taking into account the asymmetry of moisture flows depending on the direction of the temperature gradient, and also for the correction in the entry form of the equation of moisture transfer with the influence of the effect of thermal and hydraulic conductivity. © 2018 CEUR-WS. All rights reserved.