A multiphase mixture model of liquid-vapor-air flow and heat transfer in porous media

Based on classify analysis and conclusive comments about various kinds of transport theory in unsaturated porous media, a rigorous formulated and quite comprehensive, theoretical model has been established td describe multiphase flow and heat transfer phenomena in unsaturated porous media from continuum approach applying local volume- averaging technique in this paper. The model considered a large number of transport details than did the others. The concept of ''Darcian resistance of gaseous phase'' is also introduced in the model to describe the interaction between liquid phase and gas phase in their movement process.