Experimental coherent structures extraction and numerical semi-deterministic modelling in the turbulent flow behind a backward-facing step

被引：6

作者：

Aubrun, S ^{[1
]}

Kao, PL ^{[1
]}

Boisson, HC ^{[1
]}

机构：

[1] Inst Mecan Fluides Toulouse, UMR CNRS INP UPS N5502, Av Prof Camille Soula, F-31400 Toulouse, France

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2000年 / 22卷 / 1-2期

关键词：

vorticity-based conditional sampling; semi-deterministic modelling; backward-facing step; turbulence; coherent structures;

D O I：

10.1016/S0894-1777(00)00015-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The coherent structures in a turbulent Row behind a backward-facing step are analysed experimentally by the vorticity-based conditional method, and numerically by the semi-deterministic modelling. The conditional method is applied to hot wires rake measurements in a sub-sonic wind tunnel. The semi-deterministic modelling is based on a simplified approach using a modified k-epsilon model. Comparisons of the time-averaged motions and of the unsteady characteristics are done in the upper part of the shear layer after separation. It is found that semi-deterministic modelling is able to capture the coherent structures and the phenomena relating to their existence although major improvements of the method are still needed. (C) 2000 Elsevier Science Inc. All rights reserved.

引用

页码：93 / 101

页数：9

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