Simulation of Sand in Plunging Breakers
Simulation of Sand in Plunging Breakers
复制标题
切入式破碎机中沙子的模拟
DOI：
10.1061/(asce)0733-950x(1995)121:2(77
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
E. Hansen
中科院分区：
文献类型：
--
作者：
C. Pedersen;R. Deigaard;J. Fredsøe;E. Hansen
建立了一个数值模型来模拟崩塌破碎波作用下的泥沙运动。通过将喷流叠加在不破碎波上来模拟俯冲式破碎器。采用基于混合欧拉-拉格朗日描述的云格法的离散旋涡模型来描述流体动力学。在射流撞击表面和底部边界层的流动中引入旋转。扩散-对流联合过程提供了悬浮泥沙的拉格朗日描述。利用流体力学模块提供的流场，用扩散过程模拟边界层中的拾起和初始悬浮事件，用对流模拟外流域中的输运。推移质输沙量按传统公式计算，该公式将输沙率与谢尔兹参数联系起来。对复杂海底地形的模拟与德特公司进行的全尺寸实验室实验进行了比较。
A numerical model that simulates the sediment transport due to plunging breaking waves has been developed. A plunging breaker is simulated by superimposing a jet on a nonbreaking wave. The hydrodynamics are described by applying a discrete vortex model based on the mixed Eulerian-Lagrangian description of the cloud-in-cell method. Rotation is introduced in the flow where the jet impinges on the surface and in the boundary layer along the bottom. A combined diffusion-convection procedure provides a Lagrangian description of the suspended sediment. The pickup and initial suspension event in the boundary layer is simulated by a diffusion process, while the transport in the outer flow domain is simulated by convection, using the flow field provided by the hydrodynamic module. The bed-load transport is calculated by a conventional formula that relates the transport rate to the Shields parameter. A simulation over a complex bottom topography is compared to the full-scale laboratory experiments performed by Dett...