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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F13%3A00210800%21RIV14-MSM-21220___
rdf:type
skos:Concept n17:Vysledek
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
Numerical solution of compressible subsonic flows in 3D channel Numerical solution of compressible subsonic flows in 3D channel
skos:prefLabel
Numerical solution of compressible subsonic flows in 3D channel Numerical solution of compressible subsonic flows in 3D channel
skos:notation
RIV/68407700:21220/13:00210800!RIV14-MSM-21220___
n17:predkladatel
n21:orjk%3A21220
n3:aktivita
n5:Z n5:P n5:I
n3:aktivity
I, P(GA201/08/0012), P(GAP101/10/1329), P(GAP101/11/0207), Z(MSM6840770010)
n3:dodaniDat
n14:2014
n3:domaciTvurceVysledku
n23:4413849
n3:druhVysledku
n18:D
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
92607
n3:idVysledku
RIV/68407700:21220/13:00210800
n3:jazykVysledku
n20:eng
n3:klicovaSlova
compressible flows; subsonic flow; numerical solution
n3:klicoveSlovo
n7:subsonic%20flow n7:compressible%20flows n7:numerical%20solution
n3:kontrolniKodProRIV
[486391A635A4]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Praha
n3:nazevZdroje
Interaction and Feedbacks 2013
n3:obor
n13:BA
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n16:GA201%2F08%2F0012 n16:GAP101%2F10%2F1329 n16:GAP101%2F11%2F0207
n3:rokUplatneniVysledku
n14:2013
n3:tvurceVysledku
Horáček, J. Kozel, Karel Pořízková, Petra
n3:typAkce
n22:CST
n3:zahajeniAkce
2013-11-26+01:00
n3:zamer
n15:MSM6840770010
s:numberOfPages
6
n11:hasPublisher
Ústav termomechaniky AV ČR
n12:isbn
978-80-87012-49-9
n9:organizacniJednotka
21220