DIRECT NUMERICAL SIMULATION OF THE SPATIALLY DEVELOPING TURBULENT MIXING LAYER

de Bruin , I.C.C.; Geurts, Bernard J.; Kuerten, J. G. M.

Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN Imprimer: 1-56700-135-1

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

Résumé

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.

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