Numerical investigation of flow around cylinder at Reynolds number = 3900 with large eddy simulation technique: Effect of spanwise length and mesh resolution
Numerical investigation of flow around cylinder at Reynolds number = 3900 with large eddy simulation technique: Effect of spanwise length and mesh resolution
复制标题
使用大涡模拟技术对雷诺数 = 3900 的圆柱体周围流动进行数值研究：展向长度和网格分辨率的影响
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
M. Javed
中科院分区：
文献类型：
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作者：
N. B. Khan;Z. Ibrahim;Ahmad Badarudin Bin Mohamad Badry;M. Jameel;M. Javed
利用ICEM CFD和Fluent工具分别对雷诺数为3900的圆柱绕流进行了大涡模拟研究。虽然这个问题已经有很多研究者进行了探讨，但结果仍然存在差异，特别是在分离角的计算、再循环长度的计算以及缸后尾迹区域的统计等方面。此外，还需要解决横向网格和近场网格分辨率对尾迹区域的影响。本研究回顾以往的工作，并根据文献建议进行分析。研究了展向长度（4D、8D和16D）、展向网格分辨率（1、10、20、40、60、80和160元）和近场网格对再循环长度、分离角和尾迹特性计算的影响。分析了气缸周围的水动力值和压力分布。在圆柱体后面的尾迹在10个直径范围内进行研究。研究结果表明，与跨向长度相比，跨向网格分辨率和近场网格是获得高质量结果的重要因素。
Flow around a cylinder at a Reynolds number of 3900 was studied using large eddy simulation with ICEM CFD and Fluent tools for meshing and analysis, respectively. Although this issue has been explored by numerous researchers, a discrepancy still exists in the results, particularly in calculating the angle of separation, recirculation length, and statistics in the wake region behind the cylinder. In addition, the effect of spanwise grid and near-field grid resolution on the wake region needs to be addressed. This study reviews previous work and performs analyses according to the literature recommendations. The effect of spanwise length (4D, 8D, and 16D), mesh resolution in the spanwise direction (1, 10, 20, 40, 60, 80, and 160 elements), and near-field grid on calculating recirculation length, angle of separation, and wake characteristics is investigated. Hydrodynamic values and pressure distribution around the cylinder are analyzed. The wake behind the cylinder is investigated within 10 diameters. This study concluded that compared with spanwise length, mesh resolution in the spanwise direction and near-field grid are more important factors for good-quality results.