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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

DIRECT NUMERICAL SIMULATION OF THE SPATIALLY DEVELOPING TURBULENT MIXING LAYER

I.C.C. de Bruin
Faculty of Mathematical Sciences, University of Twente P.O. Box 217, 7500 AE Enschede, The Netherlands

Bernard J. Geurts
Multiscale Modeling and Simulation, J.M. Burgers Center, Faculty EEMCS, University of Twente, 7500 AE Enschede, The Netherlands Anisotropic Turbulence, Fluid Dynamics Laboratory, Department of Applied Physics, Eindhoven University of Technology

J. G. M. Kuerten
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; Multiscale Modeling and Simulation, Faculty EEMCS, University of Twente

Abstract

A direct numerical simulation of transitional and developed turbulent flow in a three-dimensional spatially developing subsonic mixing layer is performed. The streamwise, normal and spanwise momenta are sampled at characteristic locations in the flow. The corresponding correlation time is computed in the turbulent regime and compared to the averaging time needed to obtain sufficiently accurate time-averaged flow quantities. Some resulting probability density functions are shown and discussed.