Heat and mass transfer in unsaturated porous media with solid-liquid change

摘要

A model on teat and mass transfer in unsatu- rated porous media with solid/liquid phase change was developed with extending the three-variable model previ- ously proposed. The movement of air phase and its effect on the motion of water is considered. The model has been checked with comparison of the experimental results of the temperature distribution for two dimensional freezing process. The evolution of air pressure, water and ice sat- uration were predicted by solving the governing equations. The ice segregation and moisture movement toward the Front of freezing were numerically simulated.