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Statements

Subject Item
n2:RIV%2F49777513%3A23520%2F11%3A43899257%21RIV12-MSM-23520___
rdf:type
skos:Concept n16:Vysledek
dcterms:description
The present study is focused on the analysis of pulsatile blood ?ow 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 ?uid, 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 ?nite volume method formulated for unstructured tetrahedral grids. In order to model a realistic coronary blood ?ow, a time-dependent ?ow 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. The present study is focused on the analysis of pulsatile blood ?ow 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 ?uid, 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 ?nite volume method formulated for unstructured tetrahedral grids. In order to model a realistic coronary blood ?ow, a time-dependent ?ow 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.
dcterms:title
Numerical analysis of bypass model geometrical parameters in?uence on pulsatile blood ?ow Numerical analysis of bypass model geometrical parameters in?uence on pulsatile blood ?ow
skos:prefLabel
Numerical analysis of bypass model geometrical parameters in?uence on pulsatile blood ?ow Numerical analysis of bypass model geometrical parameters in?uence on pulsatile blood ?ow
skos:notation
RIV/49777513:23520/11:43899257!RIV12-MSM-23520___
n16:predkladatel
n19:orjk%3A23520
n5:aktivita
n12:Z n12:S
n5:aktivity
S, Z(MSM4977751303)
n5:cisloPeriodika
1
n5:dodaniDat
n17:2012
n5:domaciTvurceVysledku
n13:4858697 n13:6503225 n13:1589091
n5:druhVysledku
n6:J
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n18:predkladatel
n5:idSjednocenehoVysledku
216750
n5:idVysledku
RIV/49777513:23520/11:43899257
n5:jazykVysledku
n15:eng
n5:klicovaSlova
bypass model, pulsatile blood ?ow, stenosis degree, junction angle, diameter ratio, fractional-step method, finite volume method
n5:klicoveSlovo
n7:fractional-step%20method n7:stenosis%20degree n7:bypass%20model n7:pulsatile%20blood%20%3Fow n7:diameter%20ratio n7:junction%20angle n7:finite%20volume%20method
n5:kodStatuVydavatele
CZ - Česká republika
n5:kontrolniKodProRIV
[3AECDB7FDF5A]
n5:nazevZdroje
Applied and Computational Mechanics
n5:obor
n8:BK
n5:pocetDomacichTvurcuVysledku
3
n5:pocetTvurcuVysledku
3
n5:rokUplatneniVysledku
n17:2011
n5:svazekPeriodika
5
n5:tvurceVysledku
Bublík, Ondřej Jonášová, Alena Vimmr, Jan
n5:zamer
n14:MSM4977751303
s:issn
1802-680X
s:numberOfPages
16
n4:organizacniJednotka
23520