反磁性流体における磁気熱対流の過渡特性(一般セッション対流熱伝達 I)

概要

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We numerically simulated how magnetizing force affects the natural convection of water with the diamagnetic property in a vertical cylindrical container heated from below and cooled from above. When the circular electric coil was placed at the lower end plate heated isothermally, the average Nusselt number in the system with the magnetic field decreased in comparison with that in the system without the magnetic field so that natural convection was suppressed by the magnetizing force. When the circular electric coil was placed at the upper end plate cooled isothermally, the reverse tendency was computed. Furthermore, to understand the mechanism of the generation of the magnetothermal convection induced by the magnetizing force, the variety of magnetothermal convection to the steady state was visualized under two different initial conditions.
2004-11-10