This paper presents a review of the moisture transfer theories in porous media during drying processes in the last century . then an innovative pore network model in drying based invasion percolation theory and pore network theory essentially different from the classical continuum model is developed . moisture transfer characteristics in porous media during drying process are studied under isothermal and absence of gravity 本论文首先回顾了近一个世纪以来多孔介质在干燥过程中内部湿分迁移理论,指出孔道网络理论在多孔介质干燥研究中所具有的独到优势,继而借助侵入渗流理论所取得的成果,结合孔道网络理论,分析了干燥本身的湿分迁移特征,模拟研究了多孔介质在等温条件下不考虑重力时的干燥过程。
It is shown that paraffin can be uniformly absorbed into the pore network of expanded graphite , that expanded graphite remains its vermiform structure in pcms , that the phase - change temperatures of composite pcms are similar to that of paraffin , and that the latent heat of composite pcms is are based on the mass fraction of paraffin in the composite materials 结果表明:膨胀石墨吸附石蜡后仍然保持了原来疏松多孔的蠕虫状形态,石蜡被膨胀石墨微孔所吸附;复合相变储热材料的相变温度与石蜡相似,其相变潜热与基于复合材料中石蜡含量的潜热计算值相当。