A high-resolution code for turbulent boundary layers
A high-resolution code for turbulent boundary layers
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DOI：
10.1016/j.jcp.2009.02.031
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
M. Simens;J. Jiménez;S. Hoyas;Y. Mizuno
中科院分区：
文献类型：
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作者：
M. Simens;J. Jiménez;S. Hoyas;Y. Mizuno
本文介绍了一种直接模拟平板上不可压缩边界层的高分辨率程序。它可以适应大范围的压力梯度，和一般的时间依赖性的边界条件，如传入的尾流或壁强迫。平流和压力校正步骤的一致性顺序是不同的，但它表明，总的分辨率是由高阶平流步骤控制。仔细分析了边界条件的制定，以确保在任意强迫的存在下的整体质量守恒。给出了两个有和没有强逆压梯度的验证边界层，最大雷诺数Reθ = 2000。它们与现有的实验符合得很好。湍流流入条件的零压力的情况下实施的回收方法，它示出，至少初始的300动量厚度被丢弃之前，人工流入的效果被遗忘。有人认为，这不是用于产生流入的方法的缺陷，而是边界层的性质。
A new high-resolution code for the direct simulation of incompressible boundary layers over a flat plate is described. It can accommodate a wide range of pressure gradients, and general time-dependent boundary conditions such as incoming wakes or wall forcing. The consistency orders of the advective and pressure-correction steps are different, but it is shown that the overall resolution is controlled by the higher-order advection step. The formulation of boundary conditions to ensure global mass conservation in the presence of arbitrary forcing is carefully analyzed. Two validation boundary layers with and without a strong adverse pressure gradient are presented, with maximum Reynolds numbers Reθ≈2000. They agree well with the available experiments. Turbulent inflow conditions for the zero-pressure case are implemented by a recycling method, and it is shown that at least the initial 300 momentum thicknesses have to be discarded before the effect of the artificial inflow is forgotten. It is argued that this is not a defect of the method used to generate the inflow, but a property of the boundary layer.