Journal of Theoretical
and Applied Mechanics

36, 3, pp. 619-637, Warsaw 1998

Drying processes in context of the theory of fluid saturated porous materials

Stefan J. Kowalski, Grzegorz Musielak, Andrzej Rybicki
The paper presents a thermomechanical model of drying of fluid-saturated capillaric porous materials. The governing equations developed on the basis of balance equations and thermodynamics of irreversible processes are presented. Their solution allows for prediction of the evolution of moisture content distribution, deformation of the dried body, and stress induced by drying. The strains and stresses are examined in a prismatic bar dried convectively (2D initial-boundary-value problem). The influence of different drying conditions and various shapes of the bar cross-section on the strains and stresses is discussed using the linear and non-liner models, respectively.
Keywords: thermomechanical model of drying; deformation of dried body; drying induced stresses