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International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Print: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v3.i3.20
pages 267-284

Turbulent Structures in a Slightly Compressible Mixing Layer

Mohamed Si-Ameur
LESEI Laboratory, Department of Mechanical Engineering, Technology Faculty, University of Batna 2, Algeria

ABSTRACT

The configuration of a compressible mixing layer confined between rigid walls at high Reynolds number is studied at convective Mach number Mc=0.64, using the monotonically integrated large eddy simulation approach. The purpose is to analyze the flow configuration with attention to the turbulent mixing linked to large scales in the transition and turbulent zones. The full Navier-Stokes equations are solved with a high-order Godunov's scheme piecewise parabolic method with the approximate Riemann solver of Roe. On the basis of flow visualization, highly three-dimensional vortex lattices undergoing helical pairing of oblique structures are observed in the transition zone. A particular structure of mixing in sublayers is detected qualitatively and through probability density function analysis. Computed statistics are in good agreement with experimental measurements.


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