A coupled heat-moisture transfer theory for deformable unsaturated soil and its algorithmic implementation

This paper presents a formulation for coupled heat and moisture transfer in a deformable partially saturated soil. The research is based on a mechanistic phase interaction model coupled to a state surface approach. The method takes into account the coupling e¤ect of temperature gradient and deformations on ßows in porous media. Pore water pressure, pore air pressure, temperature and displacement are treated as the primary unknowns. A numerical solution of the formulation is then achieved via the Þnite element method. An example of the use of the new model is then presented