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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)
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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)
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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)
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skos:notation
| - RIV/49777513:23520/11:43899257!RIV12-MSM-23520___
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http://linked.open...avai/predkladatel
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/49777513:23520/11:43899257
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - bypass model, pulsatile blood ?ow, stenosis degree, junction angle, diameter ratio, fractional-step method, finite volume method (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
| - Applied and Computational Mechanics
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Bublík, Ondřej
- Jonášová, Alena
- Vimmr, Jan
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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http://localhost/t...ganizacniJednotka
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is http://linked.open...avai/riv/vysledek
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