Abstract
The temperature distribution and flow pattern of natural convection in a horizontal cylindrical annulus were made visible using the liquid crystal particle suspension method. Results were obtained using three kinds of silicone oil having different high Prandtl numbers. The Rayleigh number based on the gap width varied from 6.1×104 to 3.8×105. Resulting flows were observed to be steady in all cases. Numerical investigation was also performed with a transient two-dimensional finite difference scheme which have been reported in the previous paper. Comparison between the experimental and numerical results shows good agreement.
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