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Advances in Heat Transfer Engineering

ISSN:
1-56700-198-1 (Print)

NUMERICAL ANALYSIS OF AIR CONVECTION IN A VERTICAL CYLINDER SUPPORTED BY STRONG MAGNETIC FIELD

Piotr Filar
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga 816-8580, Japan

Masayuki Kaneda
Institute of Advanced Material Study, Kyushu University, Kasuga 816-8580, Japan

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

Janusz S. Szmyd
Department of Fundamental Research in Energy Engineering, Faculty of Energy and Fuels, AGH University of Science and Technology, 30 Mickiewicza Avenue, 30059 Krakow, Poland

Abstract

The convection of air was studied under the magnetic field in a vertical cylinder heated from upper 1/3 side wall and cooled from lower 1/3 side wall with thermally insulated over the mid − level side wall and upper and lower end plates. The height of the cylinder was taken as 3 times of the cylinder radius. The electric coil of double radius of the cylinder was placed at various levels around the cylinder. Computations were carried out for a non-gravitational case with axially − symmetric assumptions at γ Ra = 1.232×104 and Pr = 0.71. γ represents the magnetic strength and Ra the magnitude of the temperature difference. Depending on the coil location, average heat transfer rates were found to change between unity and 6.4.