Application of Different Sub-Grid Models Used in Large-Eddy Simulation of Flow Around a Cylinder at Re = 3900
Application of Different Sub-Grid Models Used in Large-Eddy Simulation of Flow Around a Cylinder at Re = 3900
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DOI：
10.1007/s40799-022-00568-3
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发表时间：
2022-06
影响因子：
1.6
通讯作者：
B. Wang;J. Xu
中科院分区：
文献类型：
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作者：
B. Wang;J. Xu
近年来，随着计算机性能的提高，大涡模拟数值计算的应用也随之增多。子网格模型的应用研究非常重要。本研究基于STAR-CCM + 软件，采用三种不同的亚网格模型大涡模拟方法和标准k-ε和k-ω方法对亚临界雷诺数Re= 3900下圆柱体附近的三维流动进行数值模拟。然后对几种数值方法下圆柱表面的时均压力分布、涡脱落特性、下游流场的时均速度剖面分布进行了对比分析，并与实验数据进行了比较。结果表明DSGS模型的模拟结果较为准确。另外两个子网格模型的耗散过大，流动参数的结果误差也过大。大涡模拟方法得到的结论精度优于RANS方法。大涡模拟的应用可以更好地展示流场的各种数据，本文的结果也可以为大涡模拟应用中分网格模型的选择提供一定的帮助。
In recent years, with the improvement of computer performance, the application of large eddy simulation numerical calculations has also increased. The application research of sub-grid model is very important. In this study, based on the STAR-CCM + software, three different sub-grid model large eddy simulation methods and standardk-εandk-ωmethods were used to numerically simulate the three-dimensional flow near the cylinder under subcritical Reynolds numberRe= 3900. Firstly, this research conducts a grid convergence study. Then it compares and analyzes the time-average pressure distribution on the cylindrical surface under several numerical methods, the vortex shedding characteristics, the time-average velocity profile distribution of the flow field downstream, and also compares with the experimental data. The results show that the simulation results of the DSGS model are relatively accurate. The dissipation of the other two sub-grid models is too large, and the result error of the flow parameters is also too large. The accuracy of conclusions obtained by the large eddy simulation method is better than that of the RANS method. The application of large-eddy simulation can better display the various data of the flow field, and the results of this article can also provide certain help for the selection of sub-grid model in the application of large eddy simulation.