Application of Large Eddy Simulation to an Oscillating Flow Past a Circular Cylinder
Application of Large Eddy Simulation to an Oscillating Flow Past a Circular Cylinder
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DOI：
10.1115/1.2819275
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发表时间：
1997-09
影响因子：
2
通讯作者：
Xi-yun Lu;C. Dalton;Jianfeng Zhang
中科院分区：
文献类型：
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作者：
Xi-yun Lu;C. Dalton;Jianfeng Zhang
采用粘性流动方法（VFM）和大涡模拟（LES）研究了圆柱绕流的三维正弦振荡流动。采用二阶精度的时间分数步方法和有限差分/谱近似相结合的方法求解滤波后的不可压Navier-Stokes方程。为了证明该方法的可行性和准确性，我们计算了两种情况下的稳定的方法在雷诺数Re = 100使用VFM和Re = 10 4使用LES。对于β = 1035处的正弦振荡流动，KC 2的流动为2D。对于KC = 0.5、0.8和1，使用VFM计算流量。对于KC = 2，3，4，5，8和10，我们用Smagorinsky亚网格模型用大涡模拟了流动。阻力和惯性系数是根据作用在圆柱体上的直线力计算的。
Three-dimensional sinusoidally oscillating flows around a circular cylinder are investigated by using a viscous flow method (VFM) and a large eddy simulation (LES). A second-order accurate in time fractional step method and a combined finite-difference/spectral approximation are employed to solve the filtered incompressible Navier-Stokes equations. To demonstrate the viability and accuracy of the method, we calculate two cases of steady approach flows at Reynolds numbers Re = 100 using VFM and Re = 10 4 using LES. For sinusoidally oscillating flows at β = 1035, the flow is 2D for KC 2. For KC = 0.5, 0.8 and 1, the flow is calculated using VFM. For KC = 2, 3, 4, 5, 8 and 10, we have simulated the flow using LES with the Smagorinsky subgrid scale model. The drag and inertia coefficients are calculated from the in-line force acting on the cylinder.