Abstract
An experimental study has been made on the lateral velocity of a spherical rigid particle sedimenting between two vertical concentric cylinders. The ratios of the particle radius to the distance between two cylinders are in the range of 0.01–0.04 and the particle Reynolds numbers are in the range of 0.06–0.36. It is found that the particle moves to an equilibrium position due to effects of both the inner and outer cylinders. Even when a line, forming a radius of 0.01 times the radius of the outer cylinder, was placed at the axis of the cylinder, the lateral equilibrium position was at a distance from the axis of about 0.3 times the outer cylinder radius. The experimentally determined lateral velocity is found to be in good agreement with the theory.
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