What question did this study set out to answer?

To analyze the lift force experienced by a sphere in a viscous liquid under shear flow.

The lift on a small sphere in a slow shear flow

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Investigates lift forces acting on a sphere in shear flow, suggesting implications for fluid dynamics.

To analyze the lift force experienced by a sphere in a viscous liquid under shear flow.
Derived mathematical expression for lift force based on sphere's radius, viscosity, and velocity gradient.
Discussed implications of findings concerning previously observed phenomena in Poiseuille flow.
Lift force is quantified as 81.2μVa²κ½/v½ plus smaller terms, acting perpendicular to the flow.
The lift force deflects the sphere towards streamlines moving opposite to the flow direction.

P. G. Saffman (1965) studied this question.

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