Document Detail

Particle-pressure-induced self-filtration in concentrated suspensions.
MedLine Citation:
PMID:  20866556     Owner:  NLM     Status:  In-Process    
Gravity-driven flow of concentrated suspensions (solid volume fraction ϕ>0.50) of non-brownian spherical particles through a channel contraction at low Reynolds number is studied experimentally. The abrupt change in the flow area at the contraction forms distinct shear-rate regions having different fluid pressures, which are related to the concept of particle pressure. A model involving particle pressure variation coupled to a Darcy-like behavior for the fluid captures the phenomenon of "self-filtration," in which the effluent material has lower solid fraction than the input suspension. For ϕ≐ϕ crit ≈ 0.58, under added load from a weighted piston, the flow periodically alternates between fast and slow motions.
Sandeep D Kulkarni; Bloen Metzger; Jeffrey F Morris
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Publication Detail:
Type:  Journal Article     Date:  2010-07-21
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  82     ISSN:  1550-2376     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-09-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136452     Medline TA:  Phys Rev E Stat Nonlin Soft Matter Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  010402     Citation Subset:  -    
Levich Institute and Chemical Engineering, City College of New York, New York, New York 10031, USA.
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