Počet záznamů: 1
Effect of turbulence in FE model of human vocal folds self-oscillation
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SYSNO ASEP 0474689 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Effect of turbulence in FE model of human vocal folds self-oscillation Tvůrce(i) Hájek, P. (CZ)
Švancara, Pavel (UT-L) RID, ORCID
Horáček, Jaromír (UT-L) RID, ORCID
Švec, J.G. (CZ)Celkový počet autorů 4 Zdroj.dok. Engineering Mechanics 2017. - Brno : University of technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2017 / Fuis V. - ISSN 1805-8248 - ISBN 978-80-214-5497-2 Rozsah stran s. 366-369 Poč.str. 4 s. Forma vydání Tištěná - P Akce Engineering Mechanics 2017 /23./ Datum konání 15.05.2017 - 18.05.2017 Místo konání Svratka Země CZ - Česká republika Typ akce EUR Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova simulation of phonation ; SST turbulence model ; fluid-structure-acoustic interaction ; finite element method Vědní obor RIV BI - Akustika a kmity Obor OECD Acoustics CEP GA16-01246S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 UT WOS 000411657600081 Anotace 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. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2018
Počet záznamů: 1