Simulation of unsteady compressible flow in a channel with vibrating walls - Influence of the frequency

0359140 - ÚT 2012 RIV GB eng J - Článek v odborném periodiku
Punčochářová-Pořízková, P. - Kozel, K. - Horáček, Jaromír
Simulation of unsteady compressible flow in a channel with vibrating walls - Influence of the frequency.
Computers & Fluids. Roč. 46, č. 1 (2011), s. 404-410. ISSN 0045-7930. E-ISSN 1879-0747
Grant CEP: GA MŠMT OC09019
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: finite volume method * unsteady flow * low Mach number * viscous compressible fluid
Kód oboru RIV: BI - Akustika a kmity
Impakt faktor: 1.810, rok: 2011
http://www.sciencedirect.com/science/article/pii/S0045793010003439

This study deals with the numerical solution of a 2D unsteady flow of a compressible viscous fluid in a channel for flow 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 equations for laminar flows. The numerical solution is implemented using the finite volume method (FVM) and the predictor-corrector McCormack 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 Arbitrary Lagrangian-Eulerian (ALE) form. The numerical results for unsteady flows in the channel are presented for M=0,012, Re =4500 and the wall motion frequency 20 and 100Hz.
Trvalý link: http://hdl.handle.net/11104/0196979