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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

NON BOUSSINESQ CONVECTION AROUND A SQUARE CYLINDER WITHIN A RECTANGULAR CAVITY

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.60
12 pages

Résumé

The flow generated by a heated solid square body located within a rectangular 2D cavity with cooled and/or insulated walls has been numerically studied by solving the Navier-Stokes equations under a low Mach number approximation. The square cylinder is centred on the vertical centreline of the cavity and is either kept at a constant hot temperature, or heated with a constant flux. The vertical walls (resp horizontal) are kept at a constant cold temperature and the horizontal (resp. vertical) walls are insulated. The configuration therefore exhibits a natural reflection symmetry about the vertical mid axis and the breaking of this symmetry is an important feature of the observed phenomena. The influence of aspect ratio on the onset of the first bifurcations is particularly studied for moderate value of the Rayleigh number Ra, yielding either pitchfork or Hopf bifurcations whereas larger values of Ra are also considered to study the influence of the location of the heating source.