Original title: Numerical simulation of unsteady low-Mach number viscous flow in a channel
Authors: Punčochářová, P. ; Kozel, Karel ; Horáček, Jaromír ; Fürst, J.
Document type: Papers
Conference/Event: Interaction and Feedbacks 2009, Praha (CZ), 2009-11-24 / 2009-11-25
Year: 2009
Language: eng
Abstract: This study deals with a 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 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 a system of Navier-Stokes equations for laminar flows. The numerical solution is implemented using a grid of quadrilateral cells. Due the motion of the grid, the basic equations are considered in the Arbitrary Lagrangian-Eulerian form. Numerical results are presented for Mach number 0,012m, Reynolds number 5000 and vibration frequency 100 Hz.
Keywords: airflow of vocal tract; biomechanics of voice; finite volume method
Project no.: CEZ:AV0Z20760514 (CEP), IAA200760613 (CEP)
Funding provider: GA AV ČR
Host item entry: Proceedings Interaction and Feedbacks 2009, ISBN 978-80-87012-23-9

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0177727

Permalink: http://www.nusl.cz/ntk/nusl-40722


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
 Record created 2011-07-01, last modified 2024-01-26


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