Abstract The present paper describes the application of local perturbations in Large Eddy Simulation to enhance transition to turbulence applied on the heated wall of a natural convection boundary layer. Simulations are carried out with a Prandtl number P r = 0.71 and a maximum Grashof number of G r = 4.1 × 10 11 . The purpose of this work is to accelerate the transition process in the numerical domain, reducing the needed simulation effort to reach the turbulent regime in a natural convection boundary layer flow. A parametric study has been performed to identify the fastest transition to turbulence in the proposed technique. The obtained results are compared with experimental, empirical and other numerical reference data to assess the method’s performance. The analysis of the transition method contemplates its effect in the mean flow field, as well as in the resolved Reynolds stresses and turbulent heat fluxes.

中文翻译：

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应用数值转换控制方法增强垂直受热板自然对流边界层湍流

摘要 本文描述了局部扰动在大涡模拟中的应用，以增强向自然对流边界层受热壁上施加的湍流的过渡。使用 Prandtl 数 P r = 0.71 和最大 Grashof 数 G r = 4.1 × 10 11 进行模拟。这项工作的目的是加速数值域中的过渡过程，减少在自然对流边界层流中达到湍流状态所需的模拟工作。已经进行了参数研究，以确定在所提出的技术中最快的湍流过渡。将获得的结果与实验、经验和其他数值参考数据进行比较，以评估该方法的性能。过渡方法的分析考虑了它在平均流场中的作用，