Document Detail


Shear banding in thixotropic and normal emulsions.
MedLine Citation:
PMID:  21709327     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
When made to flow, yield stress materials rarely flow homogeneously. This is mostly attributed to the fact that such materials show a transition from a solid- to a liquid-like state when the stress exceeds some critical value: the yield stress. Thus, if the stress is heterogeneous, so is the flow. Here we consider emulsion flows in a cone-plate geometry that, for Newtonian fluids, correspond to a homogeneous stress situation and show that shear banding can also be observed either due to wall slip or to the existence of a critical shear rate. By means of velocity profiles obtained using a confocal laser scanning microscope combined with a rheometer we conclude that the last type of shear banding occurs only in thixotropic yield stress materials.
Authors:
José Paredes; Noushine Shahidzadeh-Bonn; Daniel Bonn
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Publication Detail:
Type:  Journal Article     Date:  2011-06-27
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  23     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-06-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  284116     Citation Subset:  IM    
Affiliation:
Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands.
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