Numerical simulation of unsteady compressible low Mach number flow in a channel

0348198 - ÚT 2011 RIV CZ eng J - Journal Article
Punčochářová-Pořízková, P. - Kozel, Karel - Horáček, Jaromír - Fürst, J.
Numerical simulation of unsteady compressible low Mach number flow in a channel.
Engineering Mechanics. Roč. 17, č. 2 (2010), s. 83-97. ISSN 1802-1484
R&D Projects: GA MŠMT OC09019
Institutional research plan: CEZ:AV0Z20760514
Keywords : CFD * finite volume method * unsteady flow * low Mach number
Subject RIV: BI - Acoustics

This study deals with the 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 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 eq. for laminar flows. The numerical solution is implemented using the FVM and the predictor-corrector MacCormak 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 ALE form.
Permanent Link: http://hdl.handle.net/11104/0188787