ARTICLE:

• CONVECTIVE AND DIFFUSIVE PHENOMENA OF AIR IN A VERICAL CYLINDER UNDER A STRONG MAGNETIC FIELD  download article

Toshio Tagawa
Institute of Advanced Material Study, Kyushu University, Kasuga Koen 6-1, Kasuga 816-8580, Japan

Hiroyuki Ozoe
Institute of Advanced Material Study, Kyushu University, Kasuga, Japan; and Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China

K. Sassa
Dept. of Material Processing, Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, JAPAN

S. Asai
Dept. of Material Processing, Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, JAPAN

ABSTRACT

Air flow in a vertical cylindrical pipe under the presence of a strong magnetic field was studied using a finite difference method. Air is considered to be a paramagnetic fluid, whose magnetic susceptibility is relatively large among gases. The applied magnetic field was calculated by Biot-Savart's law, for electric current circulating within a coil. When a relatively high-temperature air was filled within the vertical pipe, the hot air was repelled from the pipe by both buoyant and magnetizing forces. On the other hand, when a relatively low-temperature air was filled, the buoyant flow was suppressed by the magnetizing force and the cold air remained for quite a long time.

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