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为解决多层多孔介质层间界面处含湿量不连续而使含湿量梯度不能直接作为质传递驱动势的问题,该文在仍然以含湿量梯度为质驱动势的条件下,对界面处的质量和能量守恒方程进行适当改进,使对多层多孔介质热质耦合传递的模拟结果更符合实际,通过对已发表文献的实验结果进行验证,利用验证改进后的模拟方法对新建建筑多层多孔介质围护结构进行模拟,并与以界面处的平均体积含湿量梯度作为质驱动势对模拟结果进行对比。对比结果发现:利用改进后的模拟方法模拟的围护结构干燥速度小于后者的模拟结果,模拟结果也更接近实际情况。
In order to solve the problem that the moisture content gradient can not directly serve as the driving force for the mass transfer at the interface between layers of porous media, The mass and energy conservation equations are modified properly to make the simulation result of thermal-mass coupling transmission in multi-layer porous media more realistic. By validating the experimental results of the published literature and using the verified simulation method, Layer porous media envelope structure, and with the average volume-volume at the interface gradient as a driving force of mass-driven simulation of the results were compared. The comparison results show that the drying speed of the retaining structure simulated by the improved simulation method is smaller than that of the latter, and the simulation result is closer to the actual situation.