渗流计算中的三维非结构化网格下的自由面适应网格方法  

Approach of Water Free Surface Adapting Grid System to Simulating Phreatic Surface Seepage Flow with 3D Unstructured Grids

作　　者：李连侠[1] 廖华胜[1] 郑小玉[2] 刘达 邹俊 

机构地区：[1]四川大学水力学及山区河流开发保护国家重点实验室,四川成都610065 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072 [3]广东省水利水电勘测设计研究院,广东广州510610 [4]珠江水利科学研究院,广东广州510611

出　　处：《四川大学学报（工程科学版）》2010年第4期35-41,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家科技支撑计划资助项目(2007BAC18B01);教育部博士点新教师基金资助项目(20090181120013);四川大学青年基金资助项目(校青2008037)

摘　　要：在2维正交网格系统下自由面适应网格方法的基础上,提出了3维非结构化网格下的自由面适应网格方法。该方法在迭代求解渗流自由面时,无需改动网格,而是用映射的方法去让自由面适应既定网格系统,也不需要对出逸边界进行特殊处理,其方法简单,易于程序实现;通过将数值计算结果与甘油试验及室内砂槽模拟结果相对比,表明了该方法在3维非结构化网格系统中捕捉浸润面的精度较高,拓宽了自由面适应网格方法在3维带自由面渗流问题中的应用范围。The method of water free surface adapting grid system with 2D structured grids was extended to 3D unstructured grids to simulate phreatic surface in seepage flow. In this approach,the grid system does not need to be modified or regenerated during nonlinear iterations,whereas free surface is mapped to grid nodes to determinate the final phreatic surface without handling seepage face specifically. The good agreement of computations and experimental results indicated that this method can capture the phreatic surface in 3D unstructured grids with well precision. This study extended the application range of adapting grid method in unconfined seepage flow.

关 键 词：渗流 自由面 自由面适应网格 3维非结构化网格 

分 类 号：TV131[水利工程—水力学及河流动力学]