Dynamics of a sphere with inhomogeneous slip boundary conditions in Stokes flow

Details Dynamics of a sphere with inhomogeneous slip boundary conditions in Stokes flow Dynamics of a sphere with inhomogeneous slip boundary conditions in Stokes flow

2008-01-11

arxiv.org/abs/0801.1719v1

Physics

Fluid Dynamics

13 Pages, 2 figures

Scientific paper

10.1103/PhysRevE.77.055302

The dynamic resistance of a sphere with a general inhomogeneous slip boundary condition is analysed in Newtonian unbounded uniform flow at low Reynolds number. The boundary condition is treated as a perturbation to a homogeneous sphere, assuming that the slip length magnitude b is much smaller than the sphere radius a. To first order, the effect of inhomogeneous slip is the same as that of a radial deformity of magnitude b. Full resistance tensors are presented and the dynamics of a hemispherical inhomogeneous sphere, such as a Janus particle, are explicitly calculated.

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