A two-dimensional model of laryngeal flow
Fabriborz Alipour, Virendra C. Patel · The Journal of the Acoustical Society of America · 1991
Laryngeal flow was visualized by numerical simulation. Using computational fluid dynamics, a two-dimensional model of laryngeal flow was built and aerodynamic properties were calculated for steady-state laminar regime. Three configurations of vocal folds with convergent, rectangular, and divergent glottis were used to study the effects of glottal shape on the airflow. Navier-Stokes equations were solved with numerical method of Patel et al. A boundary fitted coordinate was used in discretizing the flow domain into exponential grids. The governing equations and coordinates were transformed into computational domain and solved with finite analytic method. Results were reported on the velocity components, pressure distributions, and wall friction coefficient at Reynolds numbers of 100–900 for different configurations. Results were compared with one-dimensional Bernoulli solutions and experimental data. It was found that flow separation exits even at low Reynolds numbers and the separation point moves toward downstream as the Reynolds number increases. [Work supported by NINCDS Grant No. NS 16320-08.]