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Unsteady compressible flows in channel with varying walls

SYSNO ASEP	0426971
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Unsteady compressible flows in channel with varying walls
Author(s)	Pořízková, P. (CZ) Kozel, Karel (UT-L)_RID Horáček, Jaromír (UT-L)_{RID, ORCID}
Source Title	Journal of Physics: Conference Series, 490. - Bristol : IOP Publishing, 2014 - ISSN 1742-6588
Pages	s. 1-4
Number of pages	4 s.
Publication form	Online - E
Action	International Conference on Mathematical Modeling in Physical Sciences 2013 /2./
Event date	01.09.2013-05.09.2013
VEvent location	Prague
Country	CZ - Czech Republic
Event type	EUR
Language	eng - English
Country	GB - United Kingdom
Keywords	3D Navier-Stokes equations ; finite volume method ; low Mach number
Subject RIV	BI - Acoustics
R&D Projects	GAP101/11/0207 GA ČR - Czech Science Foundation (CSF)
Institutional support	UT-L - RVO:61388998
UT WOS	000335909300066
EID SCOPUS	84896931777
DOI	10.1088/1742-6596/490/1/012066
Annotation	This study deals with numerical solution of a 2D and 3D unsteady flows of a compressible viscous fluid in 2D and 3D 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, nearly closing the channel during oscillations. The channels shape is a simplified geometry of the glottal space in the human vocal tract. Goal is numerical simulation of flow in the channels which involves attributes of real flow causing acoustic perturbations. The system of Navier-Stokes equations closed with static pressure expression for ideal gas describes the unsteady laminar flow of compressible viscous fluid. The numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with artificial viscosity using a grid of quadrilateral cells. The unsteady grid of quadrilateral cells is considered in the form of conservation laws using Arbitrary Lagrangian-Eulerian method. The application of developed method for numerical simulations of flow fields in the 2D and 3D channels, acquired from a developed program, are presented for inlet velocity u=4.12 m/s, inlet Reynolds number Re=4481 and the wall motion frequency 100 Hz.
Workplace	Institute of Thermomechanics
Contact	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Year of Publishing	2015

Number of the records: 1