Počet záznamů: 1

Unsteady compressible flows in channel with varying walls

SYSNO ASEP	0426971
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Unsteady compressible flows in channel with varying walls
Tvůrce(i)	Pořízková, P. (CZ) Kozel, Karel (UT-L)_RID Horáček, Jaromír (UT-L)_{RID, ORCID}
Zdroj.dok.	Journal of Physics: Conference Series, 490. - Bristol : IOP Publishing, 2014 - ISSN 1742-6588
Rozsah stran	s. 1-4
Poč.str.	4 s.
Forma vydání	Online - E
Akce	International Conference on Mathematical Modeling in Physical Sciences 2013 /2./
Datum konání	01.09.2013-05.09.2013
Místo konání	Prague
Země	CZ - Česká republika
Typ akce	EUR
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	3D Navier-Stokes equations ; finite volume method ; low Mach number
Vědní obor RIV	BI - Akustika a kmity
CEP	GAP101/11/0207 GA ČR - Grantová agentura ČR
Institucionální podpora	UT-L - RVO:61388998
UT WOS	000335909300066
EID SCOPUS	84896931777
DOI	10.1088/1742-6596/490/1/012066
Anotace	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.
Pracoviště	Ústav termomechaniky
Kontakt	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Rok sběru	2015

Počet záznamů: 1