Dynamics of fibers in a wide microchannel

Details Dynamics of fibers in a wide microchannel Dynamics of fibers in a wide microchannel

2011-10-06

arxiv.org/abs/1110.1285v1

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 16 figures

Scientific paper

Dynamics of single flexible non-Brownian fibers, tumbling in a Poiseuille flow between two parallel solid plane walls, is studied with the use of the hydromultipole numerical code, based on the multipole expansion of the Stokes equations, corrected for lubrication. It is shown that for a wide range of the system parameters, the migration rate towards the middle plane of the channel increases for fibers, which are closer to a wall, or are more flexible (less stiff), or are longer. The faster motion towards the channel center is accompanied by a slower translation along the flow and a larger fiber deformation.

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