Abstract
Numerical techniques have been used to study natural convection in a fluid subjected to axial rotation. Axisymmetrical flows were studied in two different geometries for a variety of rotational speeds. For case I (R1 = 1.0, R2 = 2.5, H = 3.0), the computed flow patterns were qualitatively compared with those which would be expected from the basic rules of physics, and good agreement was obtained. Rotational speeds between Ω = 0, and Ω = 20 were studied for a Grashoff number of 3000. Increased rotational speed was found to decrease the over-all heat transfer rate. For case II (R1 = 1.0, R2 = 4.0, H = 1.0), rotational speeds of Ω = 0.0 to Ω = 40.0 were studied at a Grashoff number of 400. At low rotational speeds, a single convection cell was found, however, at higher rotational speeds, the single cell became unstable, and changed to a two-celled pattern. This transition resulted in a slight increase in the over-all heat transfer rate.
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