000021306 001__ 21306
000021306 005__ 20170522124348.0
000021306 04107 $$aeng
000021306 046__ $$k2017-05-15
000021306 100__ $$aHájek, P.
000021306 24500 $$aEFFECTS OF TURBULENCE IN FE MODEL OF HUMAN VOCAL FOLDS SELF-OSCILLATION

000021306 24630 $$n23.$$pEngineering Mechanics 2017
000021306 260__ $$bBrno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno
000021306 506__ $$arestricted
000021306 520__ $$2eng$$aThe 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 selfsustained 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 LagrangianEulerian (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.

000021306 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021306 653__ $$aSimulation of phonation, SST turbulence model, Fluid-structure-acoustic interaction, Finite element method, Biomechanics of voice.

000021306 7112_ $$aEngineering Mechanics 2017$$cSvratka, CZ$$d2017-05-15 / 2017-05-18$$gEM2017
000021306 720__ $$aHájek, P.$$iŠvec G., J.$$iHoráček, J.$$iŠvancara, P.
000021306 8560_ $$ffischerc@itam.cas.cz
000021306 8564_ $$s1145586$$uhttps://invenio.itam.cas.cz/record/21306/files/0366.pdf$$yOriginal version of the author's contribution in proceedings, page 366, section BIO.
000021306 962__ $$r21225
000021306 980__ $$aPAPER