Numerical Simulation of Unsteady Compressible Low Mach Number Flow in a Channel

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Title:Numerical Simulation of Unsteady Compressible Low Mach Number Flow in a Channel
Creators:
Punčochářová-Pořízková, Petra
Kozel, Karel
Horáček, Jaromír
Fürst, Jiří
Journal or Publication Title:
Engineering Mechanics, 17, 2, pp. 83-97
Uncontrolled Keywords:CFD, Finite Volume Method, unsteady flow, low Mach number, viscous compressible fluid

Abstract

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 equations for laminar flows. The numerical solution is implemented using the finite volume method (FVM) and the predictor-corrector MacCormack scheme with Jameson artificial viscosity using a grid of quadrilateral cells. Due to the motion of the grid, the basic system of conservation laws is considered in the Arbitrary Lagrangian-Eulerian (ALE) form. The authors present the numerical simulations of flow fields in the channel, acquired from a program developed exclusively for this purpose. The numerical results for unsteady flows in the channel are presented for inlet Mach number M_infty =0.012, Reynolds number Re_infty = 5x10^3 and the wall motion frequency 100 Hz.

Official URL: http://www.im.fme.vutbr.cz/pdf/17_2_083.pdf

Title:Numerical Simulation of Unsteady Compressible Low Mach Number Flow in a Channel
Translated title:Numerical Simulation of Unsteady Compressible Low Mach Number Flow in a Channel
Creators:
Punčochářová-Pořízková, Petra
Kozel, Karel
Horáček, Jaromír
Fürst, Jiří
Uncontrolled Keywords:CFD, Finite Volume Method, unsteady flow, low Mach number, viscous compressible fluid
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Thermomechanics > Engineering Mechanics
Journal or Publication Title:Engineering Mechanics
Volume:17
Number:2
Page Range:pp. 83-97
ISSN:1802-1484
Publisher:Association for Engineering Mechanics
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/51Publisher
ID Code:6207
Item Type:Article
Deposited On:11 Oct 2010 16:30
Last Modified:21 Feb 2012 16:19

Citation

Punčochářová-Pořízková, Petra; Kozel, Karel; Horáček, Jaromír; Fürst, Jiří (2010) Numerical Simulation of Unsteady Compressible Low Mach Number Flow in a Channel. Engineering Mechanics, 17 (2). pp. 83-97. ISSN 1802-1484

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