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On the shear-thinning and viscoelastic effects of blood flow under various flow rates
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SYSNO ASEP 0364538 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the shear-thinning and viscoelastic effects of blood flow under various flow rates Author(s) Bodnár, Tomáš (UT-L) RID
Sequeira, A. (PT)
Prosi, M. (IT)Number of authors 3 Source Title Applied Mathematics and Computation. - : Elsevier - ISSN 0096-3003
Roč. 217, č. 11 (2011), s. 5055-5067Number of pages 13 s. Language eng - English Country US - United States Keywords non-Newtonian ; viscoelastic ; Oldroyd-B ; finite-volume ; blood flow Subject RIV BK - Fluid Dynamics CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000286659100005 DOI 10.1016/j.amc.2010.07.054 Annotation The aim of this paper is to describe and discuss the results of numerical comparative study performed in order to demonstrate and quantify some of the most relevant non-Newtonian characteristics of blood flow in medium-sized blood vessels, namely its shear-thinning and viscoelastic behavior. The models studied in this work are the classical Newtonian and Oldroyd-B models, as well as their generalized (shear-thinning) modifications. Numerical tests are performed on three-dimensional geometries, namely an idealized axisymmetric stenosis and a realistic stenosed carotid bifurcation reconstructed from medical images. The numerical solution of the system of governing equations is obtained by a finite-volume method on a structured grid. Model sensitivity tests are achieved with respect to the characteristic flow rate to evaluate its impact on the observed non-Newtonian effects. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S009630031000799X
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