基于无积分节点间断有限元的二维水沙模型:(2)泥沙运动与地形演变  

Two dimensional hydrodynamic and sediment model based on quadrature-free nodal discontinuous Galerkin method. Ⅱ: Sediment transport and bed morphology

作　　者：韩露[1] 张庆河[1] 李龙翔 冉国全 李文俊 HAN Lu;ZHANG Qing-he;LI Long-xiang;RAN Guo-quan;LI Wen-jun(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University, Tianjin 300072, China)

机构地区：[1]天津大学水利工程仿真与国家重点实验室

出　　处：《水道港口》2019年第3期259-266,共8页Journal of Waterway and Harbor

基　　金：国家重点研发计划项目(2017YFC1404200)

摘　　要：泥沙输运和地形演变是河口海岸学研究的重要课题。为了合理模拟地形变化过程中泥沙运动问题,文章基于无积分节点间断有限元方法建立了二维泥沙数值模型。利用建立的数值模型模拟了水槽中泥沙冲淤过程,沙波演变过程、溃坝算例地形演变过程和三亚红塘湾悬沙运动,模拟结果与解析解或实测值吻合较好,表明该模型能够合理地模拟二维泥沙运动与地形演变过程。Sediment transport and morphology evolution in estuaries and coastal areas are of great significance. In order to simulate sediment transport on mobile bed, a two-dimensional numerical model of sediment transport was developed, based on the quadrature-free nodal discontinuous Galerkin method. The developed model was used to simulate a process of sediment entrainment and transport on sand bed in a flume, a migrating sandwave, the water flow and morphologic processes of dam-break over mobile bed, and suspended sediment motion in Hongtang Bay of Sanya. The simulated results agree with the analytical solution and measurements at laboratory or in field respectively . It is indicated that the model could be used to describe two-dimensional sediment transport and morphologic evolution process.

关 键 词：推移质 悬移质 二维泥沙模型 无积分节点间断有限元 地形演变 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]