http://www.cfd-online.com/W/index.php?title=Special:Contributions/Sstrato&feed=atom&limit=50&target=Sstrato&year=&month=CFD-Wiki - User contributions [en]2015-08-03T15:54:52ZFrom CFD-WikiMediaWiki 1.16.5http://www.cfd-online.com/Wiki/Flow_across_a_square_cylinderFlow across a square cylinder2006-04-06T22:54:44Z<p>Sstrato: /* Experiments */</p>
<hr />
<div>The flow across a square cylinder is an important test case for the validation of separated flows in the turbulent regime. In the past, it has been regularly used to validate [[Large Eddy Simulation]] (LES) models.<br />
<br />
Experiments studying the flow across a square cylinder have been available since about the time of Vickery (1966), while modern simulations usually tend to reproduce the results of Lyn and Rodi (1994) whose data set for [[Reynolds Number|Re]] = 22,000 is publicly available.<br />
<br />
The flow involves separation and coherent vortex shedding. In trying to benchmark a code with the experimental data, the following items are usually compared:<br />
<br />
* [[Strouhal number]] which is the easiest to reproduce.<br />
* Mean recirculation length.<br />
* Global drag and lift statistics, e.g. mean lift coefficient, rms lift coefficient, mean drag coefficient and rms drag coefficient.<br />
* Spatial distributions of time-averaged and phase-averaged velocities, pressure and Reynolds stresses.<br />
<br />
==References ==<br />
<br />
=== Experiments ===<br />
<br />
*{{reference-paper|author=Bearman, P. W. and Obasaju, E. D.|year=1982|title=An experimental study of pressure fluctuations on fixed and oscillating square-section cylinders|rest=119, pp 297-321}} ''We are missing the journal reference here, someone know it?''-->Journal of Fluid Mechanics, vol. 119, June 1982, p. 297-321<br />
*{{reference-paper|author=Lee, B. E.|year=1975|title=The effect of turbulence on the surface pressure field of a square prism|rest=Journal of Fluid Mechanics, 69(2), pp 263-292}}<br />
*{{reference-paper|author=Lyn, D. A., Einav, S., Rodi, W. and Park, J.-H.|year=1995|title=A laser-doppler velocimetry study of ensemble-averaged characteristics of the turbulent near wake of a square cylinder|rest=Journal of Fluid Mechanics, vol 304, pp 285-319}}<br />
*{{reference-paper|author=Lyn, D. A. and Rodi, W.|year=1994|title=The flapping shear layer formed by flow separation from the forward corner of a square cylinder|rest=Journal of Fluid Mechanics, vol 267, pp 353-376}}<br />
*{{reference-paper|author=McLean, I. and Gartshore, I.|year=1992|title=Spanwise correlations of pressure on a rigid square section cylinder|rest=41-44, pp 779-808}} ''We are missing the journal reference here, someone know it?''<br />
*{{reference-paper|author=Norberg, C.|year=1993|title=Flow around rectangular cylinders: Pressure forces and wake frequencies|rest=Journal of Wind Engineering and Industrial Aerodynamics, vol 49, pp 187-196}} <br />
*{{reference-paper|author=Vickery, B. J.|year=1966|title=Fluctuating lift and drag on a long cylinder of square cross section in a smooth and in a turbulent stream|rest=Journal of Fluid Mechanics, 25, pp 481-494}}<br />
<br />
=== Computations ===<br />
<br />
*{{reference-paper|author=Rodi, W., Ferziger, J. H., Breuer, M. and Pourquie, M.|year=1997|title=Status of large eddy simulation: Results of a workshop|rest=ASME Journal of Fluids Engineering, vol 119, pp 248-261}}<br />
*{{reference-paper|author=Sohankar, A., Davidson, L. and Norberg, C.|year=2000|title=Large eddy simulation of flow past a square cylinder: Comparison of different subgrid scale models|rest=ASME Journal of Fluids Engineering, vol 122, pp 39-47}}<br />
*{{reference-book|author=Voke, P. R.|year=1997|title=Direct and Large Eddy Simulation II|rest=pp 355-422, Kluwer Acadamic Publishers}}</div>Sstrato