求解不定常圆柱绕流的区域分裂法  

DOMAIN DECOMPOSITION METHODS FOR IMPULSIVELY STARTED FLOW AROUND A CIRCULAR CYLINDER

作　　者：武云海 

机构地区：[1]北京大学数学系

出　　处：《计算数学》1992年第3期299-305,共7页Mathematica Numerica Sinica

摘　　要：本文把区域分裂法与涡点格法相结合,以此构造一类并行算法,数值模拟不定常圆柱绕流在高Reynolds数情况下的初期流动. §1.基本问题 假设有一个半径为a的圆柱体,在静止的不可压粘性流体中,以速度U突然起动,此流动满足二维不定常Navier-Stokes无量纲化方程:Impulsively started flow around a circular cylinder is solved by the domain decomposi-tion method for the Poisson equations and by the random walks and the vortex in the cell me-thod for the vorticity equation in the subdomains. Vortices are introduced around each sub-surface at each time step to satisfy the zero-slip condition. In the range of Reynolds numbers550 to 3000 and time 0 to 5, numerical results show reasonable agreement with the flow-vi-sualization experiments.

关 键 词：圆柱绕流 区域分裂法 涡点格法 

分 类 号：O302[理学—力学]