Publication Cover
Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 29, 1996 - Issue 5
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Original Articles

TWO-DIMENSIONAL SPATIALLY DEVELOPING MIXING LAYERS

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Pages 485-509 | Received 18 Apr 1995, Accepted 04 Dec 1995, Published online: 14 Jul 2010
 

Abstract

Two-dimensional, incompressible, spatially developing mixing layer simulations are per formed with two classes of perturbations applied at the inlet boundary: (1) combinations of discrete modes from linear stability theory, and (2) a broad spectrum of modes derived from experimentally measured velocity spectra. The discrete modes from linear theory are obtained by solving the Orr-Sommerfeld equation, and linear stability analysis is used to investigate the effect of Reynolds number on the stability of mixing layers. Two-point spatial velocity and autocorrelations are used to estimate the size and lifetime of the resulting coherent structures and to explore possible feedback effects. It is shown that by forcing with a broad spectrum of modes derived from an experimental energy spectrum, many experimentally observed phenomena can be reproduced by a two-dimensional simulation.

Notes

Address correspondence to Dr. A. O. Demuren, Department of Mechanical Engineering, Old Dominion University, 238 Kaufman/Duckworth Hall, Norfolk, VA 23529, USA

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