Abstract
Three consequent bifurcations of buoyancy convection in a laterally heated cube with perfectly thermally insulated boundaries are studied. With the growth of the Grashof number, the flow becomes oscillatory unstable, then the stability reinstates at a larger Grashof number, with further increase of which the flow finally becomes unstable. It is shown that all three transitions result from an interaction between the destabilizing centrifugal mechanism and the stabilizing effect of thermal stratification.
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