采用上风有限元方法的卡门涡街模拟

Simulation of the Karman Vortex Street with the Upwind Finite Element Method

采用上风有限元方法进行了卡门涡街的瞬态过程模拟．修正的权函数技术被用来取得上风效应，时间步进方法被用来线性化方程系统．绘出了雷诺数Ｒｅ＝１００时卡门涡街流动的数值结果．在模拟中计算了特别的和涡泄出问题相关的一些量，如阻力、侧向力、涡泄出周期、斯特罗哈数等。

The transient simulation of the Karman vortex street is carried out with the upwind finite element method. The modified weighting function technique is employed to achieve upwind effect and the time stepping approach is used to linearize equation system. The Karman vortex street flow is demonstrated by the numerical result plots at the Reynolds number Re =100. A number of quantities which are particularly related to the vortex shedding problem, such as the drag force, the side force, the vortex shedding period, the Strouhal number and so on, have been computed in the simulation and compared with the numerical results obtained by other researchers.