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Near-wall treatment for the simulation of turbulent flow by the cumulant lattice Boltzmann method

机译:累积格子Boltzmann方法模拟湍流的近壁处理

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We present a new wall function implementation for the cumulant lattice Boltzmann method that sets a partial slip velocity on the wall by computing a skin frictional coefficient. Our approach uses local information and is particularly appropriate for implementations on general purpose graphics processing units. The validation of the model has been conducted by performing numerical simulations of the turbulent channel flow test case with different grid resolutions and for different Reynolds numbers. The results showed encouraging agreement with Direct Numerical Simulation data for velocity profile, Reynolds shear and normal stresses. (C) 2017 Published by Elsevier Ltd.
机译:我们提出了一种用于累积晶格玻尔兹曼方法的新墙函数实现,该方法通过计算皮肤摩擦系数来设置墙的部分滑移速度。我们的方法使用本地信息,特别适合在通用图形处理单元上实施。该模型的验证是通过对湍流通道流量测试案例进行数值模拟而进行的,该案例具有不同的网格分辨率和不同的雷诺数。结果表明,对于速度分布,雷诺剪切和法向应力,直接数值模拟数据令人鼓舞。 (C)2017由Elsevier Ltd.发布

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