Abstract
Rayleigh-Benard natural convection of water in a cylinder was measured for the rate of heat transfer under both gravitational and magnetizing force fields. The height of the enclosure is 2 mm and its diameter is 40 mm. This aspect ratio 20 can be expected to provide a Rayleigh-Benard natural convection. The lower plate is electrically heated and upper plate is cooled by running water through a constant temperature bath at 10 C. This cylinder was kept horizontally and coaxially placed in a bore space of a super-conducting magnet as large as 10 Tesla. The center of the cylinder was placed at 111 mm from the coil center of the super conducting magnet so that radial magnetic force component is minimized. The average heat transfer rate was measured by the previous technique (Ozoe and Churchill, 1973). The average Nusselt number was found to agree with the classical experimental data (Silveston, 1958) when plotted versus the magnetic Rayleigh number (Braithwaite et al., 1991) and also with our previous numerical results (Tagawa et al., 2003).
