| Weakly sheared active suspensions: Hydrodynamics, stability, and rheology. | |
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MedLine Citation:
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PMID: 21517529 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We present a kinetic model for flowing active suspensions and analyze the behavior of a suspension subjected to a weak steady shear. Asymptotic solutions are sought in Deborah number expansions. At the leading order, we explore the steady states and perform their stability analysis. We predict the rheology of active systems including an activity thickening or thinning behavior of the apparent viscosity and a negative apparent viscosity depending on the particle type, flow alignment, and the anchoring conditions, which can be tested on bacterial suspensions. We find remarkable dualities that show that flow-aligning rodlike contractile (extensile) particles are dynamically and rheologically equivalent to flow-aligning discoid extensile (contractile) particles for both tangential and homeotropic anchoring conditions. Another key prediction of this work is the role of the concentration of active suspensions in controlling the rheological behavior: The apparent viscosity may decrease with the increase of the concentration. |
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Authors:
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Zhenlu Cui |
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Publication Detail:
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Type: Journal Article Date: 2011-03-18 |
Journal Detail:
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Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 83 ISSN: 1550-2376 ISO Abbreviation: Phys Rev E Stat Nonlin Soft Matter Phys Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-04-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101136452 Medline TA: Phys Rev E Stat Nonlin Soft Matter Phys Country: United States |
Other Details:
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Languages: eng Pagination: 031911 Citation Subset: IM |
Affiliation:
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Department of Mathematics and Computer Science Fayetteville State University, Fayetteville, North Carolina 28301, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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