Natural convection heat transfer of liquid lithium under transverse and parallel magnetic fields.

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Stagnant liquid lithium contained in a vertically 1.3 m long and 46 mm I.D. 316-SS cylindrical vessel up to a 0.3 m level was heated by a concentrically inserted heater pin of 12.5 mm O.D. and 54 mm active length. The parallel magnetic field to the vessel was imposed by a superconducting magnet. The experiment covered the ranges of the lithium temperature: 320510°C, the heat flux: 1040 W/cm<SUP>2</SUP>, the transverse B: 01.2 T (Ha = 02, 730) and the parallel B = 03T (Ha = 06, 860).<BR>The temperature fluctuation is enhanced by imposing a weak magnetic field of B = 0.10.3 T for both parallel and transverse fields and almost completely suppressed with increasing to B = 1 T in the case of the transverse field but its low frequency component still remains large, becoming oscillatory, up to B = 3 T in the case of parallel field. The heat transfer shows a similar trend to the temperature fluctuation. It increases singularly by a weak B especially in the perpendicular sector to the transverse magnetic field and decreases with increasing B. In the case of parallel magnetic field, the heat transfer increases in a weak field of B = 0.10.5 T, the same as in the transverse magnetic field, but it does not decrease so much in a strong field of </>B = 13 T, presenting a rather higher value than in B = 0 T.
一般社団法人日本原子力学会の論文