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