Ultimate regime of convection: Robustness to poor thermal reservoirs

Abstract : A transition to Kraichnan ultimate regime of convection has been reported in very high Rayleigh numbers experiments, but not in all of them. These apparently contradictory results can be explained by a recent phenomenological model which accounts for the non-ideality of the plate thermal properties [Chillà et al, Physics of Fluids 16:2452 (2004)]. In this paper, we present a direct test of this model, using a low conductivity plate. We found an unaltered transition, not compatible with the model's predictions.
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Submitted on : Monday, January 31, 2005 - 9:56:09 AM
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Philippe-Emmanuel Roche, Frédéric Gauthier, Benoît Chabaud, Bernard Hébral. Ultimate regime of convection: Robustness to poor thermal reservoirs. Physics of Fluids, American Institute of Physics, 2005, 17, pp.115107. ⟨10.1063/1.2136807⟩. ⟨hal-00004093⟩

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