Abstract This article presents a detailed analysis of an improved weak recycling method used to generate turbulent inflow conditions for large-eddy simulations. Answering some of the points raised in the literature, various flat-plate cases are considered in order to evaluate the fidelity and the robustness of the method. It is shown that the distance it takes for the canonical compressible boundary layer to forget its weak recycling inflow turbulence is rather short ( M = 0.8 ) and 3D effects (wall in translation perpendicular to the main flow) show that the recycling method remains effective in more complex flows. When using limited resolution inlet flow profiles coming from experiments as an input, spurious fluctuations are observed whose main wavelength equals the recycling distance. This study proposes a strategy to circumvent this drawback by limiting the amplitude of recycled velocity fluctuations with respect to the mean velocity at the inlet.

中文翻译：

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大涡模拟中流入边界层弱循环策略的适应与评估

摘要 本文详细分析了一种改进的弱再循环方法，该方法用于为大涡模拟生成湍流流入条件。回答文献中提出的一些观点，考虑了各种平板情况，以评估该方法的保真度和稳健性。结果表明，典型可压缩边界层忘记其弱循环流入湍流所需的距离相当短（ M = 0.8 ），并且 3D 效应（垂直于主流的平移壁）表明循环方法在更复杂的流程。当使用来自实验的有限分辨率入口流量剖面作为输入时，观察到主波长等于循环距离的虚假波动。