| 孙冬梅,朱岳明,张明进.降雨入渗过程的水-气二相流模型研究[J].水利学报,2007,38(2):150-156 |
| 降雨入渗过程的水-气二相流模型研究 |
| Water-air two-phase flow model for numerical analysis of rainfall infiltration |
| |
| DOI： |
| 中文关键词: 降雨入渗 水-气二相流 饱和-非饱和渗流 积分有限差分法 Newton Raphson迭代法 |
| 英文关键词: rainfall infiltration water-air two-phase flow saturated unsaturated infiltration integral finite difference method Newton Raphson iterative method |
| 基金项目: |
|
| 摘要点击次数: 2598 |
| 全文下载次数: 218 |
| 中文摘要: |
| 本文根据多孔介质中水、气的质量守恒定律，结合多相流理论，建立了求解饱和-非饱和渗流的水-气二相流数学模型，并采用积分形式的有限差分法和Newton Raphson迭代方法进行数值求解，提出了各种边界条件，包括水相、气相和降雨入渗边界的数学处理方法。利用上述模型对土柱试验进行模拟，将计算结果与试验数据比较，验证了模型的正确性；然后对土质边坡降雨入渗过程进行计算，得到孔隙水压力、孔隙气压力和毛细压力的变化过程，其变化规律符合实际，实现了降雨入渗的水-气二相渗流过程，为定量研究空气阻力对入渗水流的影响提供有效途径。 |
| 英文摘要: |
| Based on the multi phase flow theory and the law of mass conservation for water and air in porous media a numerical model for describing the saturated unsaturated filtration in soil is established. The integral of finite difference method and Newton Raphson iterative method are applied to numerically solve the governing equations of water air two phase flow in saturated unsaturated porous media. The approaches to boundary condition treatment and obtaining unsaturated hydraulic parameters are proposed. The validity of the model is verified by the simulation for a filtration experiment of soil column. The process of rainfall infitration in a soil slope is simulated numerically. The variation of pore water pressure, pore air pressure and capillary pressure in the process of rainfall infitration are obtained. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |