Assessing Stretched-Vortex Subgrid-Scale Models in Finite Volume Methods for Unbounded Turbulent Flows

Assessing Stretched-Vortex Subgrid-Scale Models in Finite Volume Methods for Unbounded Turbulent Flows
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评估无界湍流有限体积方法中的拉伸涡亚网格尺度模型

DOI:
10.1007/s10494-020-00206-1
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发表时间:
2020
影响因子:
2.4
通讯作者:
Guzik, Stephen
Guzik, Stephen
中科院分区:
工程技术3区
文献类型:
--
作者:
Walters, Sean;Gao, Xinfeng;Johansen, Hans;Guzik, Stephen

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复杂、可压缩、高雷诺数流动的模拟需要高保真物理和湍流模型与强大的数值正则化方法适当耦合。当使用显式湍流模型和附加的数值正则化时,获得这些流动的网格独立和方案独立的解对于进一步测试和开发精确的物理模型特别重要。为此,目前的研究调查拉伸涡亚网格尺度模型和四阶分段抛物型限制器和五阶迎风插值(或高粘度)之间的相互作用。它表明,计算亚网格尺度动能估计的拉伸涡模型在一个粗糙的分辨率比基础网格提供的结果是独立的使用数值正则化技术。这被证明是一个时间演变的剪切层,无粘泰勒-格林涡的问题,和一个衰减,均匀的湍流的情况下。
Simulations of complex, compressible, high-Reynolds-number flows require high-fidelity physics and turbulence models to be appropriately coupled with strong numerical regularization methods. Obtaining grid-independent and scheme-independent solutions of these flows when using both explicit turbulence models and additional numerical regularization is especially important for further testing and development of accurate physics models. To this end, the current study investigates the interaction between the stretched-vortex subgrid-scale model and both the fourth-order piecewise parabolic limiter and a fifth-order upwinding interpolation (or hyperviscosity). It is demonstrated that computing the subgrid-scale kinetic energy estimate for the stretched-vortex model at a coarser resolution than the base mesh provides results which are independent of the use of numerical regularization techniques. This is shown to be the case for a temporally-evolving shear-layer, the inviscid Taylor–Green vortex problem, and a decaying, homogeneous turbulent flow.
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