About: Numerical analysis of bypass model geometrical parameters in?uence on pulsatile blood ?ow

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
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 (en)
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 (en)
skos:notation	RIV/49777513:23520/11:43899257!RIV12-MSM-23520___
http://linked.open...avai/riv/aktivita	S Z
http://linked.open...avai/riv/aktivity	S, Z(MSM4977751303)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Vimmr, Jan Bublík, Ondřej Jonášová, Alena
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Západočeská univerzita v Plzni / Fakulta aplikovaných věd
http://linked.open...dnocenehoVysledku	216750
http://linked.open...ai/riv/idVysledku	RIV/49777513:23520/11:43899257
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	bypass model, pulsatile blood ?ow, stenosis degree, junction angle, diameter ratio, fractional-step method, finite volume method (en)
http://linked.open.../riv/klicoveSlovo	finite volume method bypass model diameter ratio fractional-step method junction angle pulsatile blood ?ow stenosis degree
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[3AECDB7FDF5A]
http://linked.open...i/riv/nazevZdroje	Applied and Computational Mechanics
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	5
http://linked.open...iv/tvurceVysledku	Bublík, Ondřej Jonášová, Alena Vimmr, Jan
http://linked.open...n/vavai/riv/zamer	Predikce poruch heterogenních materiálů, komponent mechanických a biomechanických systémů.
issn	1802-680X
number of pages	16 (xsd:int)
http://localhost/t...ganizacniJednotka	23520

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