摘要
在Ploumhans粘性涡方法的基础上,文章研究了一种用于三维非定常流场计算的快速涡方法。同时根据壁面无滑移边界条件,提出了一种新的涡片扩散方法。通过将涡量分配给流场内的涡粒子,模拟了物面产生的涡量扩散到流体中的过程。为了降低计算量并保证较高的计算精度,采用了自适应快速多极方法进行速度及速度梯度的计算。该方法应用于球突然启动瞬态流动数值模拟,通过与实验数据及其他数值计算结果进行比较,验证了方法的可行性。
Following Ploumhans,a fast vortex method was developed for the analyses of three-dimensional unsteady flow.A new diffusion method is proposed for the vorticity creation close to a 3D body surface,in which a number of vortex particles are introduced into the flow field to satisfy the nonslip boundary condition on the boundary.An adaptive Fast Multipole Method(FMM)is used for velocity and its gradient computing to achieve high accuracy at a reasonable cost.The new scheme is applied to the simulations of starting flow around a sphere at Re=300 and 500 for investigating the feasibility.
作者
顾信忠
李舜酩
GU Xin-zhong;LI Shun-ming(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Vehicle Engineering,Nanhang Jincheng College,Nanjing 211156,China)
出处
《船舶力学》
EI
CSCD
北大核心
2019年第6期684-695,共12页
Journal of Ship Mechanics
基金
Supported by National Natural Science Foundation of China(51675262)
the Project of National Key Research and Development Plan of China(2016YFD0700800)
the Advance Research Field Fund Project of China(6140210020102)
the Fundamental Research Funds for the Central Universities(NP2018304)
the Major National Science and Technology Projects(2017-IV-0008-0045)~~
关键词
涡方法
涡片扩散
自适应快速多极方法
紊流
vortex methods
vortex sheet diffusion
adaptive fast multipole method
unsteady flow
