Abstract
Effects of velocity gradient of linear shear flows at a high Reynolds number (Re, s=4000-35000) on lift and drag applied to a spherical particle are investigated by measuring surface pressure distribution, using a pendant method, and by comparing computed and photographed trajectories of a sphere falling in upward shear flows. It is made clear that lift is applied to a sphere from the higher velocity side to the lower velocity side, that it increases as the velocity gradient becomes greater, and that drag is scarcely affected by the velocity gradient.
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