用无网格法求解不同Re下圆柱绕流问题  

Numerical simulation of flow around a cylinder for different Reusing a meshless method

作　　者：仇轶[1] 由长福[1] 祁海鹰[1] 徐旭常[1] 

机构地区：[1]清华大学热能工程系煤的清洁燃烧技术国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第2期220-223,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(10102009)

摘　　要：采用无网格伽辽金法对不同Re下二维不可压粘性流场圆柱绕流问题进行了数值模拟。该计算不仅预测了不同条件下的流动特性,而且预测了流体作用在圆柱上的曳力和升力。这些力通过积分圆柱表面的压力和粘性力获得。结果显示,当Re大于80时,圆柱所受曳力和升力开始振荡。计算所得的脱落频率(Sr)与前人的结果吻合良好。The element free Galerkin method, EFG, was used to simulate viscous, incompressible 2D flows around a cylinder for different Reynolds numbers. This analysis predicted not only the flow patterns for different conditions but also the drag and lift forces exerted by the fluid on the cylinder as well. These forces were calculated by integrating the pressure and shear force over the cylinder surface. The results show that the drag and lift forces oscillate for Reynolds numbers greater than 80. The calculated Strouhal number, a parameter characterizing the oscillations, agrees well with established results.

关 键 词：流体力学 不可压缩粘性流体 无网格Galerkin法(EFG) 分步法 

分 类 号：O357.1[理学—流体力学]