variavel0=<b>Odenir de Almeida</b> - odenir.almeida@embraer.com.br Empresa Brasileira de Aeronáutica - EMBRAER
<b>sergio said mansur</b> - mansur@dem.feis.unesp.br Faculdade de Engenharia de Ilha Solteira - UNESP
<b>Aristeu da Silveira Neto</b> - aristeus@mecanica.ufu.br UFU - Faculdade de Engenharia Mecânica
<b>Abstract.</b> The two-dimensional vortex shedding behind a square cylinder at high Reynolds numbers has been simulated in this work. Three different turbulence models - Smagorinsky (LES), k- E standard and k- E realizable - have been employed, and their respective performance was evaluated by a comparative way. Numerical calculations have been carried out by means of a finite-volume method employing a structured grid. An incompressible SIMPLEC algorithm has been employed for the velocity-pressure coupling, and a third-order QUICK scheme has been used for the treatment of convective terms. Particularly in the LES case, the influence of Smagorinsky constant on the flow field has been investigated. The numerical results, expressed in terms of quantitative parameters as Strouhal number and time-averaged velocity, are compared with experimental and numerical data from other authors. A qualitative study of the flow patterns is also evaluated by means of streamlines and vorticity contours analysis.
<b>Keywords.</b> square cylinder, vortex shedding, numerical simulation, large eddy simulation, k- E model.