基于大涡模拟的移动粒子半隐式法研究  

MOVING-PARTICLE SEMI-IMPLICIT METHOD RESEARCH BASED ON LARGE EDDY SIMULATION

作　　者：潘徐杰[1] 张怀新[1] 孙学尧[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200030

出　　处：《力学学报》2011年第3期616-620,共5页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金资助项目(50979059)~~

摘　　要：将大涡模拟(LES)和无网格的移动粒子半隐式法(MPS)相结合,以求解湍流中的自由表面问题.对N-S方程进行滤波计算可得到大涡模拟的控制方程,大涡模拟的控制方程相对于以往的移动粒子半隐式法而言仅多出雷诺应力项,通过亚粒子应力(sub-particle-scale,SPS)模型并引入Smagorinsky涡黏模型将雷诺应力模型化,可实现移动粒子半隐式法的大涡模拟.将MPS-LES应用至具有大变形自由表面的共振晃荡中,其模拟结果同实验及其他数值模拟结果都相当接近.The moving-particle semi-implicit method（MPS）,coupled with a large eddy simulation（LES）, is presented to free surface problem for turbulent flow.The control equation for LES is derived though the filtering operation of the Navier-Stokers equation.In the control equation,additional Reynolds stress terms are only different between LES and MPS.Therefore MPS is extended to LES by coupled with a sub-particle-scale （SPS） turbulence model and the Smagorinsky model which is able to describe the Reynolds stress terms.The MPS-LES method is used in the case of simulation of resonance sloshing,and the simulation result is very close to that of experiment or other numerical simulation.

关 键 词：移动粒子半隐式法 亚粒子应力模型 大涡模拟 无网格 

分 类 号：O357.1[理学—流体力学]