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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。
A meshless Galerkin method was used to simulate the circular flow around two-dimensional incompressible viscous flow field under different Re conditions. This calculation not only predicts the flow behavior under different conditions, but also predicts the drag and lift of the fluid acting on the cylinder. These forces are obtained by integrating the pressure of the cylindrical surface and the viscous force. The results show that when Re is larger than 80, the drag force and lift force of cylinder begin to oscillate. The calculated shedding frequency (Sr) is in good agreement with the previous results.