Least Squares Isogeometric Method for Transient Flow around an Impulsively Started Circular Cylinder
Abstract: To investigate the capability of least squares isogeometric method for complex flow, the method was used to simulate the transient flow around an impulsively started circular cylinder. The governing equations were first discretized in time by implicit difference scheme with third order of accuracy, and then discretized in space by least squares isogeometric method with order of accuracy more than two. The flow over a range of Reynolds numbers from 550 to 9500 was numerically simulated. Results were compared to those from other experimental and computational works. The flow modes like bulge, isolated secondary eddy, α-phenomena and β-phenomena at different Reynolds number were resolved correctly. The results show that the high order accuracy least squares isogeometric method can be used for simulation of complex transient flow.
文章引用: 徐大勇 , 陈德祥 , 郭建 , 汤继保 (2017) 圆柱突然启动后绕流的最小二乘等几何模拟。 流体动力学， 5， 83-90. doi: 10.12677/IJFD.2017.53010
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