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Numerical solution of compressible and incompressible unsteady flows in channel inspired by vocal tract

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    SYSNO ASEP0429316
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevNumerical solution of compressible and incompressible unsteady flows in channel inspired by vocal tract
    Tvůrce(i) Pořízková, P. (CZ)
    Kozel, Karel (UT-L) RID
    Horáček, Jaromír (UT-L) RID, ORCID
    Zdroj.dok.Journal of Computational and Applied Mathematics. - : Elsevier - ISSN 0377-0427
    Roč. 270, November (2014), s. 323-329
    Poč.str.7 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovacompressible ; incompressible ; unsteady ; CFD ; acoustic ; vocal tract
    Vědní obor RIVBI - Akustika a kmity
    CEPGAP101/11/0207 GA ČR - Grantová agentura ČR
    GAP101/10/1329 GA ČR - Grantová agentura ČR
    Institucionální podporaUT-L - RVO:61388998
    UT WOS000337660100030
    EID SCOPUS84901195048
    DOI10.1016/j.cam.2013.12.045
    AnotaceThis study deals with the numerical solution of a 2D unsteady flow of a viscous fluid in a 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 with large amplitudes, nearly closing the channel during oscillations. The channel is a simplified model of the glottal space in the human vocal tract. Four governing systems are considered to describe the unsteady laminar flow of a viscous fluid in the channel. The numerical solution is implemented using the finite volume method (FVM) 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 the Arbitrary Lagrangian–Eulerian method. The numerical simulations of flow fields in the channel, acquired from a developed program, are presented for inlet velocity uˆ∞=4.12ms−1 and Reynolds number Re∞=4481 and the wall motion frequency 100 Hz.
    PracovištěÚstav termomechaniky
    KontaktMarie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
    Rok sběru2015
Počet záznamů: 1