Document Detail


Flow of foam past an elliptical obstacle.
MedLine Citation:
PMID:  16906824     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
To investigate the link between discrete small-scale and continuous large scale mechanical properties of a foam, we observe its two-dimensional flow in a channel, around an elliptical obstacle. We measure the drag, lift, and torque acting on the ellipse versus the angle between its major axis and the flow direction. The drag increases with the spanwise dimension, in marked contrast with a square obstacle. The lift passes through a smooth extremum at an angle close to, but smaller than 45 degrees. The torque peaks at a significantly smaller angle 26 degrees. No existing model can reproduce the observed viscous, elastic, plastic behavior. We propose a microscopic visco-elasto-plastic model which agrees qualitatively with the data.
Authors:
Benjamin Dollet; Mélanie Durth; François Graner
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Publication Detail:
Type:  Journal Article     Date:  2006-06-08
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  73     ISSN:  1539-3755     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-08-15     Completed Date:  2006-11-07     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:  061404     Citation Subset:  -    
Affiliation:
Laboratoire de Spectrométrie Physique, Boîte Postale 87, 38402 Saint-Martin-d'Hères Cedex, France. b.dollet@utwente.nl
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