Laser and Particle Beams

Table of Contents - 1997 - Volume 15, Issue 01  

Research Article

Direct numerical simulation of turbulent mixing in shear flows

A.L. Stadnika1, V.P. Statsenkoa1, Yu.V. Yanilkina1 and V.A. Zhmailoa1

a1 Russian Federal Nuclear Center, Institute of Experimental Physics, Sarov (Arzamas-16), Russia, 607200

Abstract

This article considers one of the simplest shear flows–ID time-dependent plane mixing layer. Under certain conditions, many more complicated flows are similar to it: timeindependent plane mixing layer, initial portion of plane and round jets, initial mixing phase in cylindrical vortex, etc. This application was previously studied in a 2D approximation. In this computation the turbulence was treated as the result of random perturbations initially applied to the interface of two flows. Numerical simulation used a 2D EGAK code. The computational results were interpreted using the version of semi-empirical turbulent theory with isotropic Reynolds tensor (model 1). This article continues the studies by Bakhrakh; in addition, a similar approach is implemented based on 3D simulation with the TREK method. The data interpretation uses the version of semi-empirical theory with and without Reynolds tensor anisotropy (models 1 and 2, respectively).

(Received June 23 1996)

(Accepted August 25 1996)

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