variavel0=<b>Nathan Mendes</b> - nmendes@ccet.pucpr.br Pontifícia Universidade Católica do Paraná
<b>Paulo Cesar Philippi</b> - philippi@lmpt.ufsc.br Universidade Federal de Santa catarina
<b>Abstract.</b> The Philip and De Vries model, for modeling of heat and moisture transfer through porous media, uses as driving forces the gradients of temperature and moisture content. However, it is well known that there is discontinuity in the moisture content profile at the interface between two porous materials due to their different pore size distribution functions. To avoid this problem, some authors modified the Philip and De Vries model to replace the moisture content gradient as a driving force by either the capillary suction pressure or relative humidity. In this paper, a mathematical formulation is presented so that the moisture content can be used as driving force for moisture transport calculation through the interface between two different porous media. In conclusion, the discontinuity effects on moisture content profiles is discussed.
<b>Keywords.</b> Porous Media, Interface Discontinuity, Simulation.