Numerical simulation of unsteady low-Mach number viscous flow in a channel

0332476 - ÚT 2010 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Punčochářová, P. - Kozel, Karel - Horáček, Jaromír - Fürst, J.
Numerical simulation of unsteady low-Mach number viscous flow in a channel.
Proceedings Interaction and Feedbacks 2009. Praha: Ústav termomechaniky AV ČR, v. v. i., 2009 - (Zolotarev, I.), s. 39-46. ISBN 978-80-87012-23-9.
[Interaction and Feedbacks 2009. Praha (CZ), 24.11.2009-25.11.2009]
Grant CEP: GA AV ČR IAA200760613
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: biomechanics of voice * finite volume method * airflow of vocal tract
Kód oboru RIV: BI - Akustika a kmity

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.
Trvalý link: http://hdl.handle.net/11104/0177727