Philippe Marty , Pierre Trombetta , Jean-Paul Garandet
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Contrôle de la stabilité d'un écoulement thermoconvectif par un champ magnétique tournant
We study the flow of a liquid metal driven by thermal buoyancy in a cylindrical container. It is shown that an instability of the mixing-layer type is responsible for fluctuations of velocity and temperature when a critical value of the Grashof number is reached. This instability can be suppressed when a moderate rotating magnetic field is applied. It is shown that the Ekman pumping is responsible for the stabilisation of the initial buoyancy driven flow.
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