摘要
本文试图通过不同精度的差分格式在较高Re数下的计算结果的对照比较,以期了解在高Re数下不同格式的优劣,达到合理选择计算格式,使其达到既计算精确,又相对节省时间的目的。
A Comparative Study of upwind difference schemes with different accuracy orders is made for unsteady flow around a cylinder at high Reynolds numbers of 1200 and 105. Numerical Comparison shows that the exponential difference scheme is not applicable to the computation of the complicated vortex region behind the cylinder at the early stage of the flow. In the case it is necessary to adopt higher-order upwind difference Schemes, which can distinguish more detailed flow structure with a coarse mesh.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1990年第4期89-98,共10页
Chinese Journal of Hydrodynamics
基金
中国科学院基金
关键词
圆柱
绕流
数值模拟
雷诺数
分离
finite difference method, difference scheme, separation, vortex shedding, cylinder.
