Abstract
The lift forces on rigid spheres entrained in a vortex and a linear shear flow are
computed using a direct numerical simulation. The sphere Reynolds number is in the
range 10 to 100. The lift coefficient in a vortex is shown to be nearly two orders of
magnitude higher than that in a shear flow. The inviscid mechanism is shown to be
inadequate to account for the enhanced lift force. The effect of free rotation of the
sphere is also shown to be too small to account for the enhanced lift force. Flow
structure around the sphere is studied to explain the generation of the strong lift force
in a vortex.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
59 articles.
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