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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

MECHANISM OF MAGNETOTHERMAL WIND INDUCED BY KELVIN FORCE

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.70
9 pages

Аннотация

The model system designed to evaluate the present numerical computations is composed of two coaxial circular pipes with open ends. The outer pipe corresponds to the bore space of the superconducting magnet and is cooled isothermally. The inner pipe is assumed to be placed inside this bore space and is partly heated isothermally. This model system was considered in order to elucidate the effect of a Kelvin force on the free convection of air in the inner pipe. The vertical magnetic field gradient generated in the bore space as a source of the Kelvin force was replaced by that generated by the electric current circulating within the circular electric coil. The present numerical computations were carried out by changing the relative positions of the circular electric coil and the inner pipe. When the circular electric coil was placed at the lower end of the heated region, the free convection was accelerated by the Kelvin force and an upward magnetothermal wind was created. On the other hand, when the circular electric coil was placed at the upper end of the heated region, the free convection was suppressed by the Kelvin force and a downward magnetothermal wind was created.