Large eddy simulation of turbulent flow downstream of a backward-facing step

被引：4

作者：

Wang, Wenquan ^{[1
]}

Zhang, Lixiang ^{[1
]}

Yan, Yan ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Civil Engn & Architecture, Kunming 600051, Peoples R China

来源：

INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTATIONAL MODELING AND SIMULATION | 2012年 / 31卷

关键词：

Large eddy simulation; Dynamic global model; Turbulent flow; backward-facing step; SUBGRID-SCALE MODEL;

D O I：

10.1016/j.proeng.2012.01.984

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

large eddy simulation is used to predict turbulent flow in the separated and reattached flow regions downstream of a backward-facing step. Simulations were carried out at a Reynolds number of 28 000 (based on the step height and the upstream centreline velocity) with a channel expansion ratio of 1.25. Two subgrid-scale models were tested, namely the dynamic eddy-viscosity, and the dynamic Vreman model. Both models showed good overall agreement with available experimental data. It is conjectured that the peak in these fluctuations is caused by an impingement mechanism, in which large eddies, originating in the shear layer, impact the wall just upstream of the mean reattachment location. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Kunming University of Science and Technology

引用

页码：16 / 22

页数：7

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