Document Detail

Stable stationary vortices and traveling oscillatory vortices in a stenotic fluid-flow channel.
MedLine Citation:
PMID:  16486103     Owner:  NLM     Status:  PubMed-not-MEDLINE    
A shearing zonal flow of viscous fluid near a boundary perturbation can generate vortices that either remain attached near the boundary or detach to be abruptly carried downstream. At low speed a stationary attached vortex develops downstream from the perturbation. At higher speeds an array of traveling vortices forms, with successive rolls rotating in opposite directions. This report presents a quantitative explanation of vortex generation. We consider a setup that leads to a straightforwardly analyzable, Schrödinger-type equation. In the case of bloodflow through arteries the aforementioned traveling vortices are detectable as oscillations in the 1-100 Hz range. The detection of such oscillations is simple and is used to diagnose arterial stenosis.
David W Pravica; Martin Bier; Robert S Brock; Orville W Day
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Publication Detail:
Type:  Journal Article     Date:  2005-12-20
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  72     ISSN:  1539-3755     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2006-02-20     Completed Date:  2006-08-04     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:  067303     Citation Subset:  -    
Department of Mathematics, East Carolina University, Greenville, North Carolina 27858, USA.
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