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Numerical solution of compressible and incompressible unsteady flows in channel inspired by vocal tract
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SYSNO ASEP 0429316 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Numerical solution of compressible and incompressible unsteady flows in channel inspired by vocal tract Author(s) Pořízková, P. (CZ)
Kozel, Karel (UT-L) RID
Horáček, Jaromír (UT-L) RID, ORCIDSource Title Journal of Computational and Applied Mathematics. - : Elsevier - ISSN 0377-0427
Roč. 270, November (2014), s. 323-329Number of pages 7 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords compressible ; incompressible ; unsteady ; CFD ; acoustic ; vocal tract Subject RIV BI - Acoustics R&D Projects GAP101/11/0207 GA ČR - Czech Science Foundation (CSF) GAP101/10/1329 GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000337660100030 EID SCOPUS 84901195048 DOI https://doi.org/10.1016/j.cam.2013.12.045 Annotation This 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. 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 2015
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