非饱和土壤冻融过程中水、热耦合运移数值模拟研究

Numerical Simulation of Water and Heat Transfer During Unsaturated Soil Freezing

根据冻结条件下非饱和土壤水分运动和热量迁移的基本方程,推求冻土水热耦合迁移的数学模型。采用Grank-Nicolson格式的有限差分法,计算结果表明土壤水分、温度的计算值与实验值吻合较好。

Based on the basic equations of simultaneous soil water and heat transfer during soil freezing, the coupled equation of moisture and heat was deduced. The equations were solved numerically by the finite difference method with Grank-Nicolson. As a result the simulated values of water content and temperature followed the measured values closely.