摘要
研究了在周期来流作用下圆柱的二维、不可压缩、粘性绕流问题。运用谱方法于流函数,使流场连续依赖于幅角,而只对矢径及时间离散化。具体对k_c=4且Re=200的情形计算了流函数和涡量的时空分布。计算表明:与完全离散化N-S方程以及离散涡方法等比较,本方法具有公式简单且大大节省机时的优点。
Two -dimensional imcompressible viscous flows around a circular cylinder with periodic oncoming flow from infinity are investegated. By means of spectrum method, the stream functions are developed into Fourier series, so the stream functions depend on angle 0 continuousely. Numerical calculations are implemented for stream functions as well as vortices for the case Kc=4 and Re = 200. The results manifeste that the method used here has the advantage of simplicity and saving computer time comparing with the method of fully discretiged N -S egs. and discretiged vortices method.
出处
《计算物理》
CSCD
北大核心
1991年第4期337-346,共10页
Chinese Journal of Computational Physics
关键词
圆柱
绕流
N-S方程
数值解
谱方法
numerical method for N-S eqs.,flow around a circular cylinder, periodic oncoming flow from infinity , spectrum method
