Large-scale streamers in the sedimentation of a dilute fiber suspension

We experimentally characterize structures formed during the sedimentation of rigid fibers of high aspect ratio at small Reynolds number using particle image velocimetry. Measurements show the existence of large-scale streamers during early stages of the sedimentation process, consistent with previou...

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Bibliographic Details
Published in:Physical review letters 2005-10, Vol.95 (16), p.164506.1-164506.4, Article 164506
Main Authors: METZGER, Bloen, GUAZZELLI, Elisabeth, BUTLER, Jason E
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Instrumentation for fluid dynamics
Multiphase and particle-laden flows
Nonhomogeneous flows
Physics
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Summary:We experimentally characterize structures formed during the sedimentation of rigid fibers of high aspect ratio at small Reynolds number using particle image velocimetry. Measurements show the existence of large-scale streamers during early stages of the sedimentation process, consistent with previously published theory and numerical simulations. At longer times, the cell-wide inhomogeneities evolve into smaller-scale streamers. Measurements of spatially averaged fiber velocities and velocity fluctuations are also presented.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.164506