Inhibition of phase turbulence close to onset of convection by permeable lateral boundary condition for the mean flow - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles EPL - Europhysics Letters Year : 1989

Inhibition of phase turbulence close to onset of convection by permeable lateral boundary condition for the mean flow

Abstract

We show that the mechanisms which govern the onset of time dependence in usual Rayleigh-Bénard convection at low Prandtl number may be inhibited by a suitable choice of the lateral boundary condition for the sole mean flow. We first build a boundary condition which behaves like a rigid one for the roll flow and like a permeable one for the mean flow. We then observe that phase turbulence is inhibited close to the onset of convection. We understand this effect by solving the mean-flow field from the Cross-Newell equations. Our experimental result together with its interpretation demonstrates indirectly the existence of mean flows and enlightens the ways by which mean flows destabilize patterns.
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Dates and versions

cea-01374041 , version 1 (29-09-2016)

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  • HAL Id : cea-01374041 , version 1

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F. Daviaud, A Pocheau. Inhibition of phase turbulence close to onset of convection by permeable lateral boundary condition for the mean flow. EPL - Europhysics Letters, 1989, 9 (7), pp.675-680. ⟨cea-01374041⟩
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