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Unsteady numerical computation of airflow through vocal folds
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SYSNO ASEP 0311071 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Unsteady numerical computation of airflow through vocal folds Title Nestacionární numerický výpočet proudění vzduchu hlasivkami Author(s) Horáček, Jaromír (UT-L) RID, ORCID
Kozel, Karel (UT-L) RID
Punčochářová, Petra (UT-L) RID
Fürst, J. (CZ)Source Title 6th International conference on voice physiology and biomechanics, ICVPB 2008. - Finland : University of Tampere, 2008 / Laukkanen A.-M. ; Korpijaakko-Huuhka A.-M. - ISBN N Pages s. 175-176 Number of pages 6 s. Publication form CD-ROM - CD-ROM Action International conference on voice physiology and biomechanics Event date 06.08.2008-09.08.2008 VEvent location Tampere Country FI - Finland Event type WRD Language eng - English Country FI - Finland Keywords Navier-Stokes equations ; unsteady compressible viscous flow ; FVM Subject RIV BI - Acoustics R&D Projects IAA200760613 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation the 2D unsteady compressible viscous flow field in a symmetric channel with low inlet airflow velocity is numeically simulated. The unsteady 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 flow in the channel represents a simplified model of airflow coming from the trachea, through the glottal region with vibrating vocal folds to the human vocal tract. The numerical solution is realized by finite volume method and the explicit predictor-corrector MacCormack scheme with Jameson artificial viscosity using a grid of quadrilateral cells. The moved grid of quadrilateral cells is considered in the form of conservation laws using arbitrary Langrangian-Eulerian method. The substantial influence of a symmetry condition on the flow field pattern in supraglottal spaces is studied. 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 2009
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