Modeling of glottis closure during vocal folds self-oscillation

0492624 - ÚT 2019 CA eng C - Conference Paper (international conference)
Sváček, Petr - Horáček, Jaromír
Modeling of glottis closure during vocal folds self-oscillation.
Proceedings of the 9th International Symposium on Fluid-Structure Interaction, Flow-Sound Interaction, Flow-Induced Vibration & Noise. Toronto: University of Guelph, 2018 - (Hassan, M.), č. článku FIV2018-182.
[International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, Flow-Induced Vibration & Noise /9./. Toronto (CA), 08.07.2018-11.07.2018]
R&D Projects: GA ČR(CZ) GA16-01246S
Institutional support: RVO:61388998
Keywords : biomechanical of voice * computational fluid dynamics * FEM
OECD category: Acoustics
https://fiv2018.com/ocs/index.php/fiv2018/fivcan/paper/viewFile/182/40

The contribution presents the mathematical model and numerical simulation of interaction the vocal folds selfsustained vibrations with the incompressible viscous airflow in a simplified glottal channel. Three-mass lumped model of the vocal folds vibration is used and the Hertz impact theory is applied for treating the vocal folds contact. The flow is governed by the two-dimensional (2D) Navier–Stokes equations written in the Arbitrary Lagrangian–Eulerian (ALE) form. The stabilized finite element (FE) method is applied for numerical approximation of the flow and the new special inlet boundary condition is implemented using a penalization approach. This preliminary study shows that the penalty parameter enables to treat the complete periodic closure of the channel and to simulate the time signals of pressure and airflow velocity at the glottal inlet and outlet during vocal folds selfoscillations without changing the flutter velocity.
Permanent Link: http://hdl.handle.net/11104/0286929