Number of the records: 1
Simulation of acoustic pressure and flow velocity in human glottis
- 1.
SYSNO ASEP 0314079 Document Type A - Abstract R&D Document Type Není vybrán druh dokumentu Title Simulation of acoustic pressure and flow velocity in human glottis Title Simulace akustického tlaku a rychlosti proudění v lidských hlasivkách Author(s) Šidlof, Petr (UT-L) RID
Chaigne, A. (FR)
Doaré, O. (FR)
Cadot, O. (FR)Source Title Journal of the Acoustical Society of America. - : Acoustical Society of America - ISSN 0001-4966
Roč. 123, - (2008), s. 3664-3664Number of pages 1 s. Language eng - English Country US - United States Keywords flow separation ; Navier-Stokes equations ; vocal folds Subject RIV BI - Acoustics R&D Projects KJB200760801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The pressure and velocity fields in coronal plane along the vibrating vocal folds were studied using a finite element mathematical model. The shapes of the vocal folds were specified according to data measured on excised human larynges in phonation position. The mathematical model of the flow is based on 2D incompressible Navier-Stokes equations adapted to deal with the time-variable shape of the domain, caused by vocal fold vibration. The numerical simulations allow to observe closely various flow features related to phonation - flow separation in the glottis, Coanda effect or vortex shedding. The numerical results were verified experimentally by Particle Image velocimetry (PIV) on a physical vocal fold model. In addition to acoustic, subglottal pressure and impact intensity measurements, flow velocity fields were recorded in the domain immediately above glottis. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2009
Number of the records: 1