Suscripción a Biblioteca: Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 3
August, 7-12, 1966, Chicago, USA

HEAT AND MOISTURE TRANSFER IN CAPILLARY-POROUS MATERIALS FROM THE POINT OF VIEW OF THE THERMODYNAMICS OF IRREVERSIBLE PROCESSES

Get access (open in a dialog) DOI: 10.1615/IHTC3.660
pages 409-418

Sinopsis

The phenomenological theory of irreversible processes provides effective means for the investigation of simultaneous heat and moisture transfer in solid disperse materials. Using the general principles of this theory the linear phenomenological laws for the vector current density of moisture and vector current density of heat in solid disperse materials have been derived taking into account the cross-effects: Dufour's and Sorrete effects and the co-diffusion cross-effect of the individual phases of the moisture.
The relations obtained for the vector current density of moisture and vector current density of heat have been used to derive a system of differential equations determining the unsteady temperature and moisture fields in the material.
The paper also contains the derivation of the chemical potential of capillarybound moisture. The analysis of the derived relations proves the pronounced statistical character of this quantity.
In conclusion the paper presents a discussion of the results achieved and outlines the tasks of future research.