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Journal articles
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.
Cited literature [1 references]
https://hal-cea.archives-ouvertes.fr/cea-01374041
Contributor : Dominique Girard <>
Submitted on : Thursday, September 29, 2016 - 3:49:59 PM
Last modification on : Monday, February 10, 2020 - 6:12:21 PM
Long-term archiving on: : Friday, December 30, 2016 - 2:00:16 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, September 29, 2016 - 3:49:59 PM
Last modification on : Monday, February 10, 2020 - 6:12:21 PM
Long-term archiving on: : Friday, December 30, 2016 - 2:00:16 PM
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