Heat transfer by cylindrical obstacles in a magnetic field

Yu. Kolesnikov - O. Andreev

Institute of Physics, Latvian University, Salaspils-1, LV-2169, Latvia

Abstract
Heat transfer in a circular closed channel with conducting cylinders placed on the inner hot wall parallel to an axial uniform strong magnetic field has been studied experimentally. Stagnant zones stretched along the magnetic field above and below the cylinders arose. Intensive large scale two-dimensional vortical structures parallel to the magnetic field were generated due to flow around these zones. It has been shown that vortical structures provided a 5-6 times increase of transverse heat transfer as compared with the case of simple channel flow. The hot wall temperature decreased more than 3 times. Local characteristic have been used to provide an analysis of flow structure and redistribution of velocity and temperature fields. Figs 8, Refs 10.