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Simulation of unsteady compressible flow in a channel with vibrating walls - Influence of the frequency
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SYSNO ASEP 0359140 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Simulation of unsteady compressible flow in a channel with vibrating walls - Influence of the frequency Author(s) Punčochářová-Pořízková, P. (CZ)
Kozel, K. (CZ)
Horáček, Jaromír (UT-L) RID, ORCIDSource Title Computers & Fluids. - : Elsevier - ISSN 0045-7930
Roč. 46, č. 1 (2011), s. 404-410Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords finite volume method ; unsteady flow ; low Mach number ; viscous compressible fluid Subject RIV BI - Acoustics R&D Projects OC09019 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000290834100060 DOI 10.1016/j.compfluid.2010.11.030 Annotation This study deals with the numerical solution of a 2D unsteady flow of a compressible viscous fluid in a channel for flow 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 equations for laminar flows. The numerical solution is implemented using the finite volume method (FVM) and the predictor-corrector McCormack 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 Arbitrary Lagrangian-Eulerian (ALE) form. The numerical results for unsteady flows in the channel are presented for M=0,012, Re =4500 and the wall motion frequency 20 and 100Hz. 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 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S0045793010003439
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