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Numerical Prediction of Turbulent Wakes Behind a Square Cylinder

Published online by Cambridge University Press:  05 May 2011

Robert R. Hwang  and
Sheng-Yuh Jaw
Robert R. Hwang*
Affiliation:
Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan, R.O.C.
Sheng-Yuh Jaw*
Affiliation:
Department of Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.
*
* Professor
** Associate Professor
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Abstract

This paper presents a numerical study on turbulent vortex shedding flows past a square cylinder. The 2D unsteady periodic shedding motion was resolved in the calculation and the superimposed turbulent fluctuations were simulated with a second-order Reynolds-stress closure model. The calculations were carried out by solving numerically the fully elliptic ensemble-averaged Navier-Stokes equations coupled with the turbulence model equations together with the two-layer approach in the treatment of the near-wall region. The performance of the computations was evaluated by comparing the numerical results with data from available experiments. Results indicate that the present study gives good agreement in the shedding frequency and mean drag as well as in some phase profiles of the mean velocity.

Keywords

Turbulent wakeVortex sheddingReynolds-stress modelTwo-layer approachSquare cylinder
Type
Articles
Information
Journal of Mechanics , Volume 14 , Issue 1 , March 1998 , pp. 23 - 29
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 1998

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