Abstract
A Navier–Stokes solution of laryngeal flow during vocal fold oscillations
The Journal of the Acoustical Society of America, Vol.96(5_Supplement), pp.3341-3342
11/01/1994
DOI: 10.1121/1.410660
Abstract
Dynamic modeling of vocal fold tissue movement and laryngeal airflow was combined in a computer simulations for the purpose of voice production. A finite-element model was used for the solution of tissue mechanics and a finite volume method was used in the solution of Navier–Stokes equations for the airflow. A so-called ‘‘shadow method’’ simulated the glottal constriction in the flow model to avoid the complexity of grid movement. The two-dimensional flow equations were solved in an iterative manner until the given transglottal pressure was approximated. The flow solution was then used in the estimation of the aerodynamic forces on the tissue, required in the finite element solution of tissue movement. The results indicate that glottal velocity profiles are parabolic, with maximum velocity in the exiting jet reaching 35 m/s. The time-varying Reynolds number in the glottis can reach up to 1500 at a lung pressure of 8 cm water. The jet velocity waveform is similar to that of an excised larynx and the pressure profiles are similar to those of steady flows in physical models. Also, the displacement of the inferior portion of glottis shows previously described phase differences with the superior portions. [Work supported by NIDCD Grant No. DC00831-03.]
Details
- Title: Subtitle
- A Navier–Stokes solution of laryngeal flow during vocal fold oscillations
- Creators
- Fariborz Alipour - University of IowaIngo Titze - University of Iowa
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.96(5_Supplement), pp.3341-3342
- DOI
- 10.1121/1.410660
- ISSN
- 0001-4966
- Number of pages
- 2
- Language
- English
- Date published
- 11/01/1994
- Academic Unit
- Communication Sciences and Disorders; School of Music
- Record Identifier
- 9984719561602771
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