A mathematical model for predicting coupled heat and water movement in unsaturated soil
A mathematical model for predicting coupled heat and water movement in unsaturated soil
复制标题
预测非饱和土中热水耦合运动的数学模型
DOI：
10.1002/nag.1610020103
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
B. Dempsey
中科院分区：
文献类型：
--
作者：
B. Dempsey
研究了一种预测土壤非等温水分条件的综合水分模型。广泛的文献综述表明，基于Philip和de弗里斯方程的非等温水分运动和热传导模型将给出最佳结果。采用数值方法，对水分运动和热量传递方程进行隐式有限差分近似，编制了计算机程序，求解了土壤含水量和温度随时间的变化。
验证研究表明，水分模型可以用来准确地预测土壤中的水分条件。该模型进行了验证，从实验室研究的土柱压实与AASHO A-3和AASHO A-4土壤的水力数据。
应用水分模型研究了田间非等温水分运动。利用水分模型揭示了地下水位深度、降水量和土壤水力性质等参数对土壤含水量的影响。该模型被证明是适用于广泛的边界条件，它预测的水分温度制度与时间在土壤中利用气候输入数据。
An investigation was conducted to develop a comprehensive moisture model for predicting non-isothermal moisture conditions in soils. An extensive literature review indicated that a model based on the Philip and de Vries equations for non-isothermal moisture movement and heat conduction would give the best results. By using numerical methods, the implicit finite difference approximations to the moisture movement and heat-transfer equations were programmed for computer solution of water content and temperature in the soil with time.
Validation studies indicate that the moisture model can be used to predict accurately moisture conditions in the soil. The model was validated by using hydraulic data from laboratory studies conducted on soil columns compacted with AASHO A-3 and AASHO A-4 soil.
The application of the moisture model to the study of non-isothermal moisture movement in the field is demonstrated. The influence of parameters such as water table depth, precipitation, and soil hydraulic properties on soil moisture content are shown by use of the moisture model. The model is shown to be applicable to a wide range of boundary conditions and that it predicts the moisture-temperature regime with time in soils utilizing climatic input data.