基于动力拟序涡模型的水波三维大涡模拟  

Three-dimensional large eddy simulation of water wave using the dynamic coherent structures eddy model

作　　者：王玲玲[1] 鲁俊[1] 朱海[1] 戴会超[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《华中科技大学学报（自然科学版）》2011年第1期106-109,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2008BAB29B09);杰出青年基金资助项目(50925932);教育部博士学科点专项科研基金资助项目(20070294012);江苏省青蓝工程资助项目(K2009);河海大学2009年度优秀博士论文培育计划资助项目

摘　　要：利用大涡模拟理论数值模拟了规则波和不规则波的传播过程,采用动力拟序涡黏性亚格子应力模型进行波高及速度场的模拟.计算结果表明,模型对水波的波高及由波产生的流体速度分布模拟结果与解析值符合良好,且精度较高.对比分析了人工海绵层及Sommerfeld辐射型耦合边界条件与仅采用Sommerfeld辐射型边界条件对水波数值模拟精度的影响.结果表明动力拟序涡粘性模型可以准确地模拟水波传播特性.Waves were simulated by using large eddy simulation technique,in which a dynamic coherent eddy model proposed is used to modeled subgrid turbulent stress.The model is used to simulate the propagation of regular wave and irregular wave.Numerical results are compared with available analytical solutions in terms of velocities profiles,free surface displacement.Good agreements between computed results and analgtical solutions are obtained.The model and method are verified with high accuracy and efficiency in simulating surface wave propagation.Comparison of using the Sommerfeld radiation condition in conjunction with the artificial damping zone and the Sommerfeld radiation condition at outflow boundary is also made.

关 键 词：大涡模拟 动力拟序涡模型 规则波 不规则波 传播特性 

分 类 号：N93[自然科学总论]