含湿多孔介质传热传质三参数渗流模型研究方法

回顾了含湿多孔介质传热传质模型的发展，系统地介绍了三参数渗流模型概括的基本传递机制和物性数据，特别是松散介质的物性数据的获取方法。以埋管周围砂土内的传热传质动态过程研究为例，给出了不同边界条件的描述，介绍了介质物性数据及初始温度、含湿饱和度等的确定方法。最后，给出了常功率加热条件下，浅埋水平管道周围温度、含湿饱和度以及压力分布变化情况

Numerical simulation of heat and mass transfer in wet unsaturated porous media

This article reviews the development of models for heat and mass transfer in unsaturated porous media and presents theoretical bases of the three variable model and its property system, especially the method to obtain these property data. A typical example concerned with the transient heat and mass transfer process in unsaturated porous media around a buried pipe is presented, which explains the defining of boundary conditions, property data and the method to obtain the initial temperature and wet saturation values. At last, the article gives the temperature, wet saturation and pressure distributions in the porous media around a buried horizontal pipe under constant heat flow.