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Unsteady compressible flows in channel with varying walls
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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, ORCIDZdroj.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