Počet záznamů: 1

Numerical solutions of unsteady flows with low inlet Mach numbers

  1. 1.
    0342983 - UT-L 2011 RIV NL eng J - Článek v odborném periodiku
    Punčochářová, Petra - Furst, Jiří - Horáček, Jaromír - Kozel, Karel
    Numerical solutions of unsteady flows with low inlet Mach numbers.
    Mathematics and Computers in Simulation. Roč. 80, č. 8 (2010), s. 1795-1805 ISSN 0378-4754
    Grant CEP: GA AV ČR IAA200760613
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: finite volume method * unsteady flow * low Mach number * viscous compressible fluid
    Kód oboru RIV: BI - Akustika a kmity
    Impakt faktor: 0.812, rok: 2010
    http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V0T-4Y0D67D-1-R&_cdi=5655&_user=640952&_pii=S0378475409003607&_origin=search&_coverDate=04%2F30%2F2010&_sk=999199991&view=c&wchp=dGLbVlb-zSkzk&md5=ed6eaf0a050968ee978714fd54e7f131&ie=/sdarticle.pdf http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V0T-4Y0D67D-1-R&_cdi=5655&_user=640952&_pii=S0378475409003607&_origin=search&_coverDate=04%2F30%2F2010&_sk=999199991&view=c&wchp=dGLbVlb-zSkzk&md5=ed6eaf0a050968ee978714fd54e7f131&ie=/sdarticle.pdf

    This study deals with numerical solution of a 2D unsteady flow 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, and to the human vocal tract. The flow is described by the Navier-Stokes equations. The solution is implemented using the finite volume method and the predictor-corrector MacCormach scheme with Jameson artificial viscosity using a gird of quadrilateral cells and the Arbitrary Lagrangian-Eularian (ALE) method. The numerical results for unsteady flows in the channel are presented for inlet Mach number 0.012, Reynolds number 5000 and wall motion frequency 100 Hz.
    Trvalý link: http://hdl.handle.net/11104/0185577