Počet záznamů: 1  

Numerical simulation of unsteady compressible low Mach number flow in a channel

  1. 1.
    0348198 - UT-L 2011 RIV CZ eng J - Článek v odborném periodiku
    Punčochářová-Pořízková, P. - Kozel, Karel - Horáček, Jaromír - Fürst, J.
    Numerical simulation of unsteady compressible low Mach number flow in a channel.
    Engineering Mechanics. Roč. 17, č. 2 (2010), s. 83-97. ISSN 1802-1484
    Grant CEP: GA MŠk OC09019
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: CFD * finite volume method * unsteady flow * low Mach number
    Kód oboru RIV: BI - Akustika a kmity

    This study deals with the numerical solution of a 2D unsteady flow of a compressible 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 and the flow can represent a model of airflow coming from the trachea, through the glottal region with periodically vibrating vocal folds to the human vocal tract. The flow is described by the system of Navier-Stokes eq. for laminar flows. The numerical solution is implemented using the FVM and the predictor-corrector MacCormak scheme with Jameson artificial viscosity using a gird of quadrilateral cells. Due to the motion of the gird, the basic system of conservation laws is considered in the ALE form.
    Trvalý link: http://hdl.handle.net/11104/0188787