Document Detail

Particle pressure in a sheared suspension: a bridge from osmosis to granular dilatancy.
MedLine Citation:
PMID:  19392165     Owner:  NLM     Status:  PubMed-not-MEDLINE    
The normal stress exerted by particles in a sheared suspension is measured by analogy with a method used to measure osmotic pressure in solutions. Particles in a liquid are confined by a fine screen to a gap between two vertical concentric cylinders, the inner of which rotates. Pressure in the liquid is sensed either by a manometer or by a pressure transducer across the screen. The particles are large enough so that Brownian motion and equilibrium osmotic pressure are vanishingly small. The measured pressure yields the shear-induced particle pressure Pi, the nonequilibrium continuation of equilibrium osmotic pressure. For volume fractions 0.3< or =varphi< or =0.5, Pi is strongly dependent on varphi, and linear in shear rate. Comparisons of the measured particle pressure with modeling and simulation show good agreement.
Angélique Deboeuf; Georges Gauthier; Jérôme Martin; Yevgeny Yurkovetsky; Jeffrey F Morris
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Publication Detail:
Type:  Journal Article     Date:  2009-03-09
Journal Detail:
Title:  Physical review letters     Volume:  102     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-04-27     Completed Date:  2009-05-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  108301     Citation Subset:  -    
Univ Pierre et Marie Curie-Paris6, Univ Paris-Sud, CNRS, Laboratoire FAST, Campus universitaire d'Orsay, 91405 Orsay Cedex, France.
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