On Application of Finite Element Method for Fluid-Structure-Acoustic Interactions Related to Human Phonation Process

Abstract: Human voice is created by a complex process consisting of mutual interactions of flowing air, vibrating vocal folds and the sound propagation through the vocal tract. The fundamental sound is created by the mutual interaction of the flowing air with vibrations of vocal folds(VFs). The arising fundamental sound is enriched by aeroacoustic sound sources and propagated through the vocal tract. In this talk, mathematical models of a simplified fluid-structure-acoustic interaction problem shall be, numerically discretized and numerical results will be presented. In particular the deformation of an elastic body representing the model of vocal folds will be considered in the interaction with the complex fluid flow and aeroacoustics. In particular the attention will be paid to several important issues of such a modelling as the inclusion of the VFs contact, choice of suitable boundary conditions, the influence of pre-stressed vocal fold on the fundamental frequency, etc. For the flow model the realization of the variational multiscale method is discussed. The numerical approximation of the problem is presented and numerical results are shown.

MathematicsPhysics

Audience: researchers in the topic

Nečas Seminar on Continuum Mechanics

Series comments: This seminar was founded on December 14, 1966.

Faculty of Mathematics and Physics, Charles University, Sokolovská 83, Prague 8. If not written otherwise, we will meet on Mondays at 15:40 in lecture hall K3 (2nd floor)