Large eddy simulation of flows past an array of square cylinders
Large eddy simulation of flows past an array of square cylinders
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DOI：
10.1080/00221686.2022.2161957
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发表时间：
2023-03
影响因子：
2.3
通讯作者：
Hongbao Huang;Jianmin Zhang;J. Meng
中科院分区：
文献类型：
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作者：
Hongbao Huang;Jianmin Zhang;J. Meng
流过一系列方形圆柱体的流动在广泛的应用中发生。为了研究这些流动，我们对流过由多个较小的方形圆柱体组成的圆形阵列的流动进行了三维大涡模拟，其中阵列直径定义的雷诺数为1994。我们对不同固体体积分数（svf）的方柱阵列进行了模拟（）。分析了不同构型对流动特性的影响。由于方形圆柱体之间的距离较大，当SVF较小时，会出现周期性的阻力波动，并且受到其他圆柱体的冲击会产生涡脱落。当SVF较大时，随着时间的推移，没有观察到阻力的显著波动。采用最小方柱间距来衡量旋涡脱落程度，反映了方柱位置与阻力波动的关系。
ABSTRACT The flows past an array of square cylinders occur in wide range of applications. To study these flows, we conducted three-dimensional large-eddy simulations for flows past an array of the circular shape formed by multiple smaller square cylinders, where the Reynolds number defined by the array diameter was 1994. We conducted simulations with different solid volume fractions (SVFs) of the square cylinder array ( ). The effects of these configurations on flow characteristics were analyzed. Periodic drag fluctuation was observed when the SVF was small since the distance between the square cylinder was large, and the vortex shedding occurred with impact from other cylinders. No significant fluctuation in the drag was observed over time when the SVF was large. The minimum distance between the square cylinders was used to measure the degree of vortex shedding and reflect the relationship between the square cylinder position and the drag fluctuation.