Magnetic Bénard-Marangoni convection in an annular liquid layer

Abstract

The linear stability is studied for the Bénard-Marangoni convection in a diamagnetic liquid layer sustained by surface tension around a cylinder in the absence of gravitational force. A surface of the cylinder is kept at a constant temperature while a liquid surface is heated or cooled. An azimuthal magnetic field generated by an electric current through the central axis of the cylinder is considered. A combined convection takes place owing to the radial magnetic buoyancy force as well as the Marangoni effect acting at the liquid surface. It is shown that the convection of diamagnetic liquid can be enhanced or suppressed by the use of magnetic field. © 2012 The Japan Society of Mechanical Engineers.