Boundary layer (shear-band) in frustrated viscoplastic flows

We show that frustrated creep flows of yield stress fluids give rise to a boundary layer, which takes the form of a liquid region of uniform significant thickness separating two solid regions. In this boundary layer the shear rate is approximately constant for a given flow rate and the layer thickne...

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Bibliographic Details
Published in:Europhysics letters 2013-05, Vol.102 (4), p.48002
Main Authors: Chevalier, T., Rodts, S., Chateau, X., Boujlel, J., Maillard, M., Coussot, P.
Format: Article
Language:English
Subjects:
47.20.Gv
62.20.F
83.60.La
Engineering Sciences
Materials and structures in mechanics
Mechanics
Physics
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Summary:We show that frustrated creep flows of yield stress fluids give rise to a boundary layer, which takes the form of a liquid region of uniform significant thickness separating two solid regions. In this boundary layer the shear rate is approximately constant for a given flow rate and the layer thickness varies extremely slowly with the flow rate.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/102/48002