APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Performance of a reduced-order FSI model for flow-induced vocal fold vibration

摘要

Vocal fold vibration during speech production involves a three-dimensionalunsteady glottal jet flow and three-dimensional nonlinear tissue mechanics.A full 3D fluid-structure interaction (FSI) model is computationallyexpensive even though it provides most accurate information about thesystem. On the other hand, an efficient reduced-order FSI model is usefulfor fast simulation and analysis of the vocal fold dynamics, which can beapplied in procedures such as optimization and parameter estimation. In thiswork, we study performance of a reduced-order model as compared with thecorresponding full 3D model in terms of its accuracy in predicting thevibration frequency and deformation mode. In the reduced-order model, we use a 1D flow model coupled with a 3D tissue model that is the same as in thefull 3D model. Two different hyperelastic tissue behaviors are assumed. Inaddition, the vocal fold thickness and subglottal pressure are varied forsystematic comparison. The result shows that the reduced-order modelprovides consistent predictions as the full 3D model across different tissuematerial assumptions and subglottal pressures. However, the vocal foldthickness has most effect on the model accuracy, especially when the vocalfold is thin.