摘要
提出并发展的一种基于区域分解思想,综合了解 N—S方程的有限差分法及涡法各自优点的新数值方法,计算了各种 Keulegan-Carpenter 数下(Kc=2～24)振荡流绕圆柱的流动。系统地研究了振荡流中涡旋运动模式随 Kc 数变化的规律,模拟了不对称区、单对涡区(或模向区)、双对涡区(或对角区)和三对涡区四种不同的涡旋运动模式。将计算所得的阻力系数 C_D、惯性系数 C_M与国外近期发表的计算结果进行了比较。
A new hybrid finite difference and vortex method,which is based on domain decom- position and proposed by the authors,is used for calculating the oscillating flow around a circular cylinder at various Keulegan-Carpenter numbers(K_c=2～24)respectively.The rules of variation of vortex motion patterns with K_c numbers are studied systematically.The vortex motion pat- terns in asymmetric regime,single pair(ortransverse) regime,double pair(or diagonal)regime and three pairs regime are first successfully simulated in China.The calculated drag and inertial coefficients are in better agreement with experiments than other recent numerical results.
出处
《计算物理》
CSCD
北大核心
1996年第1期73-78,共6页
Chinese Journal of Computational Physics
基金
国家自然科学基金
中科院力学所非线性连续介质力学开放实验室资助课题
关键词
振荡流
分离流动
涡旋运动模式
有限差分
oscillating flow
separated flow
vortex motion pattern
domain decomposition method
finite difference method
vortex method
