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Název:
Effect of turbulence in FE model of human vocal folds self-oscillation
Autoři: Hájek, P. ; Švancara, Pavel ; Horáček, Jaromír ; Švec, J.G.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2017 /23./, Svratka (CZ), 20170515
Rok: 2017
Jazyk: eng
Abstrakt: The purpose of the study is to determine whether a turbulence model in fluid flow calculation affects the vocal folds (VF) vibration and the acoustics of human vocal tract (VT). The objective is examined using a two-dimensional (2D) finite element (FE) model of the fluid-structure-acoustic interaction for self-sustained oscillations of the VF. The FE model consists of the models of the VF, the trachea and a simplified model of the human VT. The developed FE model includes large deformations of the VF tissue and VF contact interrupting the airflow during glottis closure. The airflow is modelled by the unsteady viscous compressible Navier-Stokes equations, without and with the Shear Stress Transport (SST) turbulence model. Fluid-structure interaction (FSI) and morphing of the fluid mesh are realized using Arbitrary Lagrangian-Eulerian (ALE) approach. The method is applied on the FE model of the VT shaped for the Czech vowel [a:]. Also effect of varying stiffness of the superficial lamina propria (SLP) is analyzed. The numerical simulations showed that considering of the turbulence affects mainly higher frequencies apparent in a frequency spectrum of the VT acoustics.
Klíčová slova: finite element method; fluid-structure-acoustic interaction; simulation of phonation; SST turbulence model
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2017, ISBN 978-80-214-5497-2, ISSN 1805-8248
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0279388
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-371019
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Autoři: Hájek, P. ; Švancara, Pavel ; Horáček, Jaromír ; Švec, J.G.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2017 /23./, Svratka (CZ), 20170515
Rok: 2017
Jazyk: eng
Abstrakt: The purpose of the study is to determine whether a turbulence model in fluid flow calculation affects the vocal folds (VF) vibration and the acoustics of human vocal tract (VT). The objective is examined using a two-dimensional (2D) finite element (FE) model of the fluid-structure-acoustic interaction for self-sustained oscillations of the VF. The FE model consists of the models of the VF, the trachea and a simplified model of the human VT. The developed FE model includes large deformations of the VF tissue and VF contact interrupting the airflow during glottis closure. The airflow is modelled by the unsteady viscous compressible Navier-Stokes equations, without and with the Shear Stress Transport (SST) turbulence model. Fluid-structure interaction (FSI) and morphing of the fluid mesh are realized using Arbitrary Lagrangian-Eulerian (ALE) approach. The method is applied on the FE model of the VT shaped for the Czech vowel [a:]. Also effect of varying stiffness of the superficial lamina propria (SLP) is analyzed. The numerical simulations showed that considering of the turbulence affects mainly higher frequencies apparent in a frequency spectrum of the VT acoustics.
Klíčová slova: finite element method; fluid-structure-acoustic interaction; simulation of phonation; SST turbulence model
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2017, ISBN 978-80-214-5497-2, ISSN 1805-8248
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0279388
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-371019
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2018-01-11, naposledy upraven 2022-09-29.