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Effects of Imposing the Continuity Condition on Artificially Generated Inflow Turbulence for LES of a Plane Boundary-Layer Flow

机译:将连续性条件施加在人工产生的流动湍流上的影响平面边界层流动的影响

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Although artificially generated inflow turbulence satisfies statistical properties of turbulence, the generated inflow turbulence usually attenuates inside the computational domain, especially in the region near the inflow boundary. This is mainly because artificially generated inflow turbulence does not always satisfy the governing equations (momentum and continuity equations). In this study, the effects of imposing the continuity condition on artificially generated inflow turbulence in the LES analysis of a plane boundary-layer flow were investigated by comparing the results with those without the continuity condition and using periodic inlet-outlet and lateral boundary conditions. The results showed that about 11-12% of the attenuation of the turbulent kinetic energy near the inflow boundary was improved by imposing the continuity condition.
机译:尽管人工产生的流入湍流满足湍流的统计性质,但是产生的流入湍流通常在计算结构域内衰减,尤其是在流入边界附近的区域内。这主要是因为人工产生的流入湍流并不总是满足控制方程(动量和连续性方程)。在这项研究中,通过将结果与没有连续性条件的情况进行比较并使用周期性入口和横向边界条件,研究了对平面边界层流动的LES分析中的线圈分析中的连续性条件的影响。结果表明,通过施加连续性条件,提高了大约11-12%的湍流动能的衰减,得到了导入的连续性条件。

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