Computation of a Rising Bubble in an Enclosure Filled with Liquid Metal under Vertical Magnetic Fields
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概要
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Three-dimensional numerical computations for a single bubble rising in a liquid metal within a rectangular enclosure in a uniform vertical magnetic field are carried out. In this study, the bubble shape, the velocity field and the electric current density field interact with one another under the influence of the vertical magnetic field. This is a triple simultaneous problem. The pressure and the electric potential fields are obtained with an iterative procedure by the HSMAC method. The numerical results exhibit that the rising velocity of the bubble for the range of Hartmann number 0<Ha<75 is slightly larger than that of Ha=0 because of the drag reduction due to suppression effect on flow separation behind the bubble. On the other hand, the bubble rising velocity decreases monotonously with the increase in the Hartmann number for Ha>75 owing to deceleration effect on the fluid flow by the magnetic field. The bubble elongates in the direction of the uniform magnetic field because of the modification of the pressure distribution by the Lorentz force.
- 社団法人 日本鉄鋼協会の論文
- 2010-03-15
著者
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田川 俊夫
首都大学東京
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Ueno Kazuyuki
Department Of Aeronautical Engineering Kyoto University.
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TAGAWA Toshio
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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TAGAWA Toshio
Tokyo Metropolitan University
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田川 俊夫
首都大
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田川 俊夫
九州大学先導物質化学研究所
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田川 俊夫
首都大東京
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Tagawa Toshio
Department Of Aerospace Engineering Tokyo Metropolitan University
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SHIBASAKI Yosuke
Department of Aerospace Engineering, Tohoku University
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Shibasaki Yosuke
Department Of Aerospace Engineering Tohoku University
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