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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F14%3A00217560%21RIV15-MSM-21220___
rdf:type
n5:Vysledek skos:Concept
dcterms:description
This study deals with numerical solution of a 2D and 3D unsteady flows of a compressible viscous fluid in 2D and 3D channel for low inlet airflow velocity. The unsteadiness of the flow is caused by a prescribed periodic motion of a part of the channel wall, nearly closing the channel during oscillations. The channels shape is a simplified geometry of the glottal space in the human vocal tract. Goal is numerical simulation of flow in the channels which involves attributes of real flow causing acoustic perturbations. The system of Navier-Stokes equations closed with static pressure expression for ideal gas describes the unsteady laminar flow of compressible viscous fluid. The numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with artificial viscosity using a grid of quadrilateral cells. The unsteady grid of quadrilateral cells is considered in the form of conservation laws using Arbitrary Lagrangian-Eulerian method. The application of developed method for numerical simulations of flow fields in the 2D and 3D channels, acquired from a developed program, are presented for inlet velocity u=4.12 m/s, inlet Reynolds number Re=4481 and the wall motion frequency 100 Hz. This study deals with numerical solution of a 2D and 3D unsteady flows of a compressible viscous fluid in 2D and 3D channel for low inlet airflow velocity. The unsteadiness of the flow is caused by a prescribed periodic motion of a part of the channel wall, nearly closing the channel during oscillations. The channels shape is a simplified geometry of the glottal space in the human vocal tract. Goal is numerical simulation of flow in the channels which involves attributes of real flow causing acoustic perturbations. The system of Navier-Stokes equations closed with static pressure expression for ideal gas describes the unsteady laminar flow of compressible viscous fluid. The numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with artificial viscosity using a grid of quadrilateral cells. The unsteady grid of quadrilateral cells is considered in the form of conservation laws using Arbitrary Lagrangian-Eulerian method. The application of developed method for numerical simulations of flow fields in the 2D and 3D channels, acquired from a developed program, are presented for inlet velocity u=4.12 m/s, inlet Reynolds number Re=4481 and the wall motion frequency 100 Hz.
dcterms:title
Unsteady compressible flows in channel with varying walls Unsteady compressible flows in channel with varying walls
skos:prefLabel
Unsteady compressible flows in channel with varying walls Unsteady compressible flows in channel with varying walls
skos:notation
RIV/68407700:21220/14:00217560!RIV15-MSM-21220___
n4:aktivita
n10:P n10:Z
n4:aktivity
P(GA201/08/0012), P(GAP101/10/1329), P(GAP101/11/0207), Z(MSM6840770010)
n4:cisloPeriodika
March
n4:dodaniDat
n9:2015
n4:domaciTvurceVysledku
n18:4413849
n4:druhVysledku
n19:J
n4:duvernostUdaju
n17:S
n4:entitaPredkladatele
n8:predkladatel
n4:idSjednocenehoVysledku
52038
n4:idVysledku
RIV/68407700:21220/14:00217560
n4:jazykVysledku
n14:eng
n4:klicovaSlova
compressible flows; ALE method; numerical simulation
n4:klicoveSlovo
n6:compressible%20flows n6:ALE%20method n6:numerical%20simulation
n4:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n4:kontrolniKodProRIV
[86917FFDD892]
n4:nazevZdroje
Journal of Physics: Conference Series
n4:obor
n15:BA
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
3
n4:projekt
n13:GAP101%2F10%2F1329 n13:GA201%2F08%2F0012 n13:GAP101%2F11%2F0207
n4:rokUplatneniVysledku
n9:2014
n4:svazekPeriodika
490
n4:tvurceVysledku
Kozel, Karel Horáček, J. Pořízková, Petra
n4:zamer
n16:MSM6840770010
s:issn
1742-6588
s:numberOfPages
4
n12:organizacniJednotka
21220