Three-dimensional Non-hydrostatic Model for Small Amplitude Free Surface Flows with Unstructured Grid

摘要：

　　A three-dimensional,non-hydrostatic pressure,numerical model for small amplitude free surface flows is presented.The model uses semi-implicit fractional step method and the semi-Lagrangian method is used to compute the convection terms.The bottommost and topmost elements of variable height allow a faithful representation of the bed and the time-varying flee-surface,respectively.The resulting model is mass conservative,and unconditionally stable with respect to the gravity wave speed,wind stress,vertical viscosity,and bottom friction.The model is applied to two examples to simulate unsteady small amplitude free surface flows where non-hydrostatic pressures have a considerable effect on the velocity field.The newly developed model is verified against analytical solutions with excellent agreement.

关键词： unstructured grid non-hydrostatic free surface flows 3-D numerical model

作者: LV Biao

作者单位: Key Laboratory of Engineering Sediment, Ministry of Transport, Tianjin Research Institute for Water Transport Engineering, Tianjin 300456, China

会议类型: 国际会议

会议名称: The 4th International Conference on Environmental Technology and Knowledge Transfer(第四届亚欧环境技术及知识转化国际研讨会(2012ICET))

会议地点: 合肥

会议语种:英文

页码: 769-774

在线出版日期: 2012-05-24（万方平台首次上网日期，不代表论文的发表时间）