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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Convective stability of vertical parallel flow in a uniformly heated enclosure

Get access (open in a dialog) DOI: 10.1615/IHTC12.30
6 pages

Sinopsis

A linear stability analysis is performed of the buoyancy-driven flow in a vertical cavity, heated by uniform heat fluxes on the four walls. Comparison of the stability analysis predictions against numerical simulations shows the validity of the parallel approximation for the base flow, for cavity aspects ratios of 5 or so. Either thermal or hydrodynamic oscillating instability modes, indicating a Hopf type bifurcation of the base solution, are predicted, for all Prandtl numbers and heat flux ratios considered. For small Prandtl numbers, both modes can occur at the codimension 2 intersection points of the critical branches.