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首页> 外文会议>International Symposium on Engineering Turbulence Modelling and Measurements >Direct numerical and large eddy simulations of turbulent flows through concentric annuli
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Direct numerical and large eddy simulations of turbulent flows through concentric annuli

机译：通过同心annuli的直接数值和大型涡流模拟湍流流动

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摘要

Direct and large eddy simulations are performed for turbulent concentric annular pipe flows with several radius ratios. The mean turbulent quantities and budgets for the Reynolds stress are examined. In the inner region, the mean velocity shifts downward from the log-law and the normal stresses decrease as the radius ratio decreases. The production terms of the Reynolds stress near the inner wall become smaller than those near the outer wall, and the pressure-strain term of the shear stress in the inner region is suppressed. In the present LES, we use a one-equation-type subgrid scale model proposed by the authors and simulate high Reynolds number annular pipe flows.
机译：针对具有多个半径比的湍流同心环形管道流动进行直接和大涡流模拟。检查雷诺应激的平均湍流数量和预算。在内部区域中，平均速度从记录法向下移位，随着半径比降低，正常应力降低。内壁附近的雷诺应力的生产术语变得小于外壁附近的压力，并且抑制内部区域中的剪切应力的压力 - 应变项。在当前的LES中，我们使用作者提出的单型型级谱比例模型，并模拟高雷诺数环形管道流动。

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