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Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

BUOYANCY INDUCED 3D-TRANSITION BEHIND A HEATED CYLINDER

pages 717-722
DOI: 10.1615/TSFP3.1210
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RESUMO

3D-transition behind a heated cylinder is studied at low Reynolds numbers. Both experimental and numerical techniques are used, including an electro-chemical tin-precipitation visualization method and a 3D Spectral Ele-ment Method. It is observed that 3D vortical structures are formed directly behind the cylinder. Distinct counter-rotating vortices are observed and they are associated with a non-uniform temperature distribution along the spanwise direction in the near-wake. These vortices induce thermal plumes to escape from the upper braid in the far-wake.

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