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Numerical simulation of unsteady compressible low Mach number flow in a channel
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SYSNO ASEP 0348198 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Numerical simulation of unsteady compressible low Mach number flow in a channel Author(s) Punčochářová-Pořízková, P. (CZ)
Kozel, Karel (UT-L) RID
Horáček, Jaromír (UT-L) RID, ORCID
Fürst, J. (CZ)Source Title Engineering Mechanics. - : Association for Engineering Mechanics - ISSN 1802-1484
Roč. 17, č. 2 (2010), s. 83-97Number of pages 15 s. Language eng - English Country CZ - Czech Republic Keywords CFD ; finite volume method ; unsteady flow ; low Mach number Subject RIV BI - Acoustics R&D Projects OC09019 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation 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. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2011
Number of the records: 1