Large-eddy simulation of wall-bounded turbulent flow with high-order discrete unified gas-kinetic scheme

Rui Zhang, Chengwen Zhong, Sha Liu, Congshan Zhuo

科研成果: 期刊稿件文章同行评审

18 引用 (Scopus)

摘要

In this paper, we introduce the discrete Maxwellian equilibrium distribution function for incompressible flow and force term into the two-stage third-order Discrete Unified Gas-Kinetic Scheme (DUGKS) for simulating low-speed turbulent flows. The Wall-Adapting Local Eddy-viscosity (WALE) and Vreman sub-grid models for Large-Eddy Simulations (LES) of turbulent flows are coupled within the present framework. Meanwhile, the implicit LES are also presented to verify the effect of LES models. A parallel implementation strategy for the present framework is developed, and three canonical wall-bounded turbulent flow cases are investigated, including the fully developed turbulent channel flow at a friction Reynolds number (Re) about 180, the turbulent plane Couette flow at a friction Re number about 93 and lid-driven cubical cavity flow at a Re number of 12000. The turbulence statistics, including mean velocity, the r.m.s. fluctuations velocity, Reynolds stress, etc. are computed by the present approach. Their predictions match precisely with each other, and they are both in reasonable agreement with the benchmark data of DNS. Especially, the predicted flow physics of three-dimensional lid-driven cavity flow are consistent with the description from abundant literature. The present numerical results verify that the present two-stage third-order DUGKS-based LES method is capable for simulating inhomogeneous wall-bounded turbulent flows and getting reliable results with relatively coarse grids.

源语言英语
文章编号26
期刊Advances in Aerodynamics
2
1
DOI
出版状态已出版 - 12月 2020

指纹

探究 'Large-eddy simulation of wall-bounded turbulent flow with high-order discrete unified gas-kinetic scheme' 的科研主题。它们共同构成独一无二的指纹。

引用此