摘要
本文综合Chorin的涡方法、网格涡方法和泊松方程快速解法的优点,采用固定离散涡的数目和位置,随时间变化调整离散涡强度的计算方法,对Kc数在1到5之间,β数在10到1665之间圆柱在振荡流动中的流场结构进行了数值模拟。并与U型振荡水槽中的流场涡结构显示照片比较,计算结果表明,数值解在稳定性和收敛性方面都是比较好的。与显示照片相比,其符合程度也是令人满意的。
This paper presents an improved algorithm which combines the advantages of Chorin's vortex method, Vortex-in-Cell method and rapid elliptic algorithm. In the present method, the numbers and positions of the discrete vortices are fixed on meshes, and the vor-ticities of the discrete vortices are adjusted with the time advances. Numerical simulations of flow structure around a circular cylinder in oscillatory flow, ranging in Kc from 1 to 5 and β from 10 to 1665, are presented in the paper. The comparison of the numerical results to the pictures of flow visualization is also made in order to test and verify the calculation results. The numerical solutions are good in stability and convergence, and the comparison is satisfactory.
出处
《力学学报》
EI
CSCD
北大核心
1992年第3期274-282,共9页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
振荡流动
圆柱
绕流
流场结构
oscillatory flow, flow structure around a circular cylinder, discrete vortex method.
