Název: Numerical analysis of bypass model geometrical parameters influence on pulsatile blood flow
Autoři: Jonášová, Alena
Vimmr, Jan
Bublík, Ondřej
Citace zdrojového dokumentu: Applied and Computational Mechanics. 2011, vol. 5, no. 1, p. 29-44.
Datum vydání: 2011
Nakladatel: University of West Bohemia
Typ dokumentu: article
článek
URI: http://www.kme.zcu.cz/acm/index.php/acm/article/view/140/91
http://hdl.handle.net/11025/1376
ISSN: 1802-680X (Print)
2336-1182 (Online)
Klíčová slova: model bypassu;pujsující průtok krve;míra stenózy;metoda dělení časového kroku
Klíčová slova v dalším jazyce: bypass model;pulsatile blood flow;stenosis degree;fractional-step method
Abstrakt: The present study is focused on the analysis of pulsatile blood flow in complete idealized 3D bypass models in dependence on three main geometrical parameters (stenosis degree, junction angle and diameter ratio). Assuming the blood to be an incompressible Newtonian fluid, the non-linear system of Navier-Stokes equations is integrated in time by a fully implicit second-order accurate fractional-step method. The space discretization is performed with the help of the cell-centred finite volume method formulated for unstructured tetrahedral grids. In order to model a realistic coronary blood flow, a time-dependent flow rate taken from corresponding literature is considered. For the analysis of obtained numerical results, special emphasis is placed on their comparison in the form of velocity isolines at several selected cross-sections during systolic and diastolic phases. The remainder of this paper is devoted to discussion of walls shear stress distribution and its oscillatory character described by the oscillatory shear index with regard to areas prone to development of intimal hyperplasia or to thrombus formation.
Práva: © 2011 - University of West Bohemia. All rights reserved.
Vyskytuje se v kolekcích:Volume 5, number 1 (2011)
Články / Articles (KME)
Volume 5, number 1 (2011)

Soubory připojené k záznamu:
Soubor Popis VelikostFormát 
91.pdf678,76 kBAdobe PDFZobrazit/otevřít


Použijte tento identifikátor k citaci nebo jako odkaz na tento záznam: http://hdl.handle.net/11025/1376

Všechny záznamy v DSpace jsou chráněny autorskými právy, všechna práva vyhrazena.