Third Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP3
BUOYANCY INDUCED 3D-TRANSITION BEHIND A HEATED CYLINDER
pages 717-722
DOI: 10.1615/TSFP3.1210
RÉSUMÉ
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.