各向异性动态模型用于可压缩流体大涡模拟的高阶DG方法
Anisotropic dynamic models for Large Eddy Simulation of compressible flows with a high order DG method
AI总结：
本文研究了各向异性动态模型在可压缩流体大涡模拟中的影响，采用高阶不连续有限元方法，通过低维子空间投影作为LES滤波器，验证了该模型在近壁区对流动特征的准确捕捉能力。
摘要：
本文在基于高阶不连续有限元的数值模型框架下，评估了各向异性动态模型在可压缩流体大涡模拟中的影响。将与低阶基函数相关的低维子空间投影作为LES滤波器，沿变分多尺度模板的思路进行。与文献中可用的通道流DNS结果相比，马赫数为0.2、0.7和1.5时的比较显示，各向异性模型能够很好地再现流动的一些关键特征，尤其是在近壁区，流动各向异性起着重要作用。
英文摘要：
The impact of anisotropic dynamic models for applications to LES of compressible flows is assessed in the framework of a numerical model based on high order discontinuous finite elements. The projections onto lower dimensional subspaces associated to lower degree basis function are used as LES filter, along the lines proposed in Variational Multiscale templates. Comparisons with DNS results available in the literature for channel flows at Mach numbers 0.2, 0.7 and 1.5 show clearly that the anisotropic model is able to reproduce well some key features of the flow, especially close to the wall, where the flow anisotropy plays a major role.
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