大气对流对土壤内热湿迁移影响的实验研究

EXPERIMENTAL STUDY ON HEAT AND MOISTURE TRANSFER IN UNSATURATED SOIL CAUSED BY AIR CONVECTION

对土壤内热湿迁移过程进行了研究。通过对土壤内热湿迁移机理分析，根据质量守恒和能量守恒原理，建立了土壤非饱和区热湿迁移的理论模型。对大气对流环境条件下砂土内热湿迁移过程进行了实验研究。通过实验测量和数值计算，获得了不同大气对流速度作用下土壤中温度、含水率分布以及水分蒸发强度的变化。

Heat and moisture transfer in unsaturated soil is studied.Based on analysis on mechanism of heat and water transfer in unsaturated soil,and mass and energy conservation principles,the theoretical model of heat and water migration in unsaturated soil is established.Experimental investigation on heat and water transfer of sandy soil with air convection are carried out.The temperature,volumetric water content and water table evaporation strength in varied air convection velocity are obtained by experimental measurement and numerical simulation.