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High-order incompressible large-eddy simulation of fully inhomogeneous turbulent flows

机译:完全不均匀湍流的高阶不可压缩大涡模拟

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摘要

The subgrid-scale (SGS) eddy-viscosity model developed by Vreman [Phys. Fluids 16 (2004) 3670] and its dynamic version [Phys. Fluids 19 (2007) 065110] are tested in large-eddy simulations (LES) of the turbulent flow in an Re= 12,000 lid-driven cubical cavity by comparison to the direct numerical simulation (DNS) data of Leriche and Gavrilakis [Phys. Fluids 12 (2000) 1363]. This appears to be the first test of this class of model to flows without any homogeneous flow directions, which is typical of flows in complex geometries. Additional LES predictions at Re= 18,000 and Re= 22,000 are compared to the DNS data of Leriche [J. Sci. Comp. 27 (2006)]. The new LES framework yielded excellent agreement for both the mean velocity and Reynolds stress profiles and matches DNS data better than the more traditional Smagorinsky-based SGS models.
机译:Vreman开发的亚网格规模(SGS)涡流粘度模型[Phys。 Fluids 16(2004)3670]及其动态版本[Phys。通过与Leriche和Gavrilakis的直接数值模拟(DNS)数据进行比较,在Re = 12,000盖子驱动的立方腔中对湍流的大涡模拟(LES)中测试了Fluids 19(2007)065110]。流体12(2000)1363]。这似乎是此类模型在没有任何均匀流向的情况下进行的首次测试,这是复杂几何形状中流的典型特征。将Re = 18,000和Re = 22,000处的其他LES预测与Leriche的DNS数据进行比较[J.科学比较27(2006)]。与基于Smagorinsky的传统SGS模型相比,新的LES框架在平均速度和雷诺应力分布方面均达成了出色的协议,并且与DNS数据的匹配更好。

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