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Coherent turbulent structures in flow through the human vocal tract
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SYSNO ASEP 0353275 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Coherent turbulent structures in flow through the human vocal tract Author(s) Šidlof, Petr (UT-L) RID
Doaré, O. (FR)
Cadot, O. (FR)
Čejka, J. (CZ)Source Title Experimental Fluid Mechanics 2010 - Conference Proceedings, Volume 1. - Linerec : Technical University of Liberec, 2010 / Vít T. ; Dančová P. - ISBN 978-80-7372-670-6 Pages s. 662-669 Number of pages 8 s. Action Experimental Fluid Mechanics 2010 Event date 24.11.2010-26.11.2010 VEvent location Liberec Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords vocal folds ; PIV ; airflow Subject RIV BI - Acoustics R&D Projects KJB200760801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation This paper presents experimental and computational data on the coherent turbulent structures in flow through the human vocal tract. The experimental results were obtained using a 4:1 scaled self-oscillating physical model of vocal folds. Flow velocity fields in the coronal plane were visualized and measured using a PIV system phase-synchronized with vocal fold vibration. Computational results originate from finite volume discretizations of viscous incompressible Navier-Stokes equations in 2D and 3D. The results reveal flow separation in the divergent part of glottis and formation of a planar jet. Vortex structures are shed from the shear layer of the jet and convected further downstream. The computational model helps to assess the influence of the ventricular folds on the flow patterns. 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 2011
Number of the records: 1