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Three-dimensional Rayleigh-Bénard instability in a supercritical fluid

Abstract : This paper describes the unsteady convective flow of a supercritical fluid in the Rayleigh-Bénard configuration. Two-dimensional earlier studies reported fast temperature equilibrium due to the piston effect and the development of a convective instability when the local Rayleigh number exceeds a critical value. In the present work, a high order 3D finite volume method has been developed and optimized, and to our knowledge, we show for the first time a three-dimensional convective instability in a supercritical fluid. Inspecting the time-evolution of temperature field patterns, we exhibit corner effects and a three-dimensional behavior of the flow.
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Submitted on : Thursday, June 13, 2013 - 5:13:21 PM
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Gilbert Accary, Isabelle Raspo, Patrick Bontoux, Bernard Zappoli. Three-dimensional Rayleigh-Bénard instability in a supercritical fluid. Comptes Rendus Mécanique, Elsevier Masson, 2004, 332 (3), pp.209-216. ⟨10.1016/j.crme.2004.01.009⟩. ⟨hal-00833947⟩



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