Numerical simulation of phonation onset: comparison of finite element glottal flow approximation with a simplified model

0359925 - ÚT 2012 DE eng A - Abstrakt
Horáček, Jaromír - Sváček, P.
Numerical simulation of phonation onset: comparison of finite element glottal flow approximation with a simplified model.
AVFA-COST Action 2103/CoMeT 2011. Franfurkt/Main: Goethe Universitat of Frankfurt/Main, 2011 - (Neumann, K.). s. 18
[AVFA - COST Action 2103/CoMeT 2011. 15.05.2011-17.05.2011, Franfurkt/Main]
Grant CEP: GA ČR(CZ) GAP101/11/0207
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: aeroelasticity * flutter boundaries * vocal fold * flow induced vibrations
Kód oboru RIV: BI - Akustika a kmity

The instability threshold is studied in the time domain using 2D FE model of the viscous incompressible flow coupled with two-degrees of freedom mode of the vocal folds. The Navier-Stokes equations are spatially discretized with the aid of the stabilized FE method. The motion of the computational domain is treated with the aid of ALE method. The structure dynamics is replaced by a kinematically equivalent system with the two degrees of freedom governed by a system of ordinary differential equations and discretized in time by an implicit multistep method and strongly coupled with the flow model. The influence of inlet/outlet boundary conditions is studied and the numerical analysis is performed and compared to the related results obtained for the phonation onset by using a simplified flow model.
Trvalý link: http://hdl.handle.net/11104/0197606