一种有限体积悬沙输运模型在苏北辐射沙脊群海域的应用  

A sediment transport numerical model with finite volume method using in the radial sand ridge field of South Yellow Sea

作　　者：孙大威[1] 张鑫 

机构地区：[1]内蒙古民族大学,通辽028000 [2]河北省水运工程规划设计院,天津300074

出　　处：《水道港口》2016年第3期237-241,共5页Journal of Waterway and Harbor

基　　金：内蒙古民族大学博士科研启动基金资助项目(BS325)

摘　　要：悬沙输运是近岸水域地形演变的重要因素之一,南黄海辐射沙脊群海域悬沙在波浪和潮流的共同作用下有着巨量的输运。文章构建了基于无结构三角形网格的Roe-MUSCL有限体积悬沙输运数值模型,其中心思想是使悬沙浓度求解过程同步且具有高分辨率。基于无结构三角形网格,将每一个独立的三角形单元作为控制个体,分别在各三角形单元上对控制方程进行Gauss线积分离散,采用二阶MUSCL重构格式和Roe型数值通量形式对控制方程进行空间离散,采用一阶向前差分格式的时间离散方法,通过对扩散项的平衡处理,建立了能够适应复杂地形和水动力条件下的高分辨二维有限体积悬沙输运数学模型,并根据当地海域的悬沙浓度实测资料进行数值验证。Suspended sediment transport is an important factor for the evolution of the offshore area. A large amount of suspended sediment is transported under the wave and current action in the radial sand ridge field of the South Yellow Sea. Based on triangular grid, each single triangle element was seemed as the control volume to make Gauss line integral and discrete process. By the format of second order MUSCL Reconstruction and Roe flux, the space discretization of the governing equations was made. With the method of time discretization which based on the format of one-order forward difference and the equilibrium treatments of diffusion term,the two-dimensional water and sediment mathematical model with finite volume and high precision was established for complex terrain and hy-drodynamic condition, and the water flow of the radial sand ridge field in the northern part of Jiangsu province was numerically simulated.

关 键 词：悬沙输运方程 有限体积法 无结构网格 

分 类 号：TV139.16[水利工程—水力学及河流动力学]