Contrôle de la stabilité d'un écoulement thermoconvectif par un champ magnétique tournant
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- 作者：Marty ; Philippe ; Trombetta ; Pierre ; Garandet ; Jean-Paul
- 关键词：magné ; tohydrodynamique / stabilité ; hydrodynamique / convection thermique / champs magné ; tiques tournants / fluides tournants ; magnetohydrodynamic / hydrodynamic stability / thermal convection / rotating magnetic fields / rotating fluids
- 刊名：Comptes Rendus de lAcademie des Sciences Series IIB Mechanics Physics Chemistry Astronomy
- 出版年：1998
- 出版时间：March, 1998
- 年：1998
- 卷：326
- 期：3
- 页码：185-190
- 全文大小：604 K
文摘
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.