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对突发高温作用下多孔介质中发生的动态行为进行了考察。在干燥区采用温度、蒸汽压力和空气压力，在含湿区采用温度、饱和度和空气压力为独立变量来描述多孔介质的热质迁移过程。在数值方法上解决了模型的参数结构和计算速度问题。利用锡的浇铸实验，对模型进行了实验验证。结果表明，在误差允许的范围内，本模型与实验结果较好地相符。利用该数值模型对１０００℃下的开口二维干燥过程进行了模拟。结果表明，突发高温作用下温度的变化速度最快，饱和度的变化最慢，温度、压力、饱和度三者相互关联，综合起来反映了突发高温下传热传质的基本特征。
The dynamic behavior in porous media under sudden high temperature was investigated. The temperature, steam pressure and air pressure are used in the drying zone. The independent variables of temperature, saturation and air pressure in the wet zone are used to describe the heat and mass transfer process of porous media. In the numerical method to solve the model of the parameter structure and speed of calculation. Using tin casting experiment, the model was experimentally verified. The results show that the model is in good agreement with the experimental results within the allowable error range. The numerical model was used to simulate the two-dimensional drying process at 1000 ℃. The results show that the temperature changes rapidly under the action of sudden high temperature, the saturation changes slowly, and the temperature, pressure and saturation correlate with each other, which reflects the basic characteristics of heat and mass transfer under sudden high temperature.