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Three Dimensional FSI Modelling of Sulcus Vocalis Disorders of Vocal Folds

Published online by Cambridge University Press:  02 July 2018

A. Vazifehdoostsaleh ,
N. Fatouraee ,
M. Navidbakhsh  and
F. Izadi
A. Vazifehdoostsaleh
Affiliation:
Department of Mechanical EngineeringRamsar BranchIslamic Azad UniversityRamsar, Iran
N. Fatouraee*
Affiliation:
Biological Fluid Mechanics Research LaboratoryBiomechanics DepartmentBiomedical Engineering FacultyAmirkabir University of TechnologyTehran, Iran
M. Navidbakhsh
Affiliation:
School of Mechanical EngineeringIran University of Science and TechnologyTehran, Iran
F. Izadi
Affiliation:
ENT-Head and Neck Research Center and DepartmentHazratrasoulakram HospitalTehran University of Medical ScienceTehran, Iran
*
*Corresponding author (Nasser@aut.ac.ir)
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Abstract

The effect of sulcus vocalis on vocal folds function is investigated. A type II sulcus vocalis is defined, parameterized and incorporated into a three-dimensional, fully coupled finite element model of vocal folds and laryngeal airway. The proposed Fluid-Structure Interaction (FSI) model is utilized in computational fluid dynamics, Arbitrary Lagrangian-Eulerian (ALE), incompressible continuity and Navier-Stokes equations and in a structure range of a three-layer elastic linear model. Flow parameters, vibration behavior and glottal jet aerodynamics of healthy and patient vocal folds models are compared with each other. Flow visualization is utilized to characterize Coanda effect and three dimensionality of flow patterns. The vibration frequency of vocal folds having sulcus vocalis decreases in comparison with that of healthy ones. Upon increasing the volume flux in the sulcus vocalis model, the non-periodic and disordered behavior of it is visible for patient vocal folds. Underlying mechanisms for the observed changes, possible implications for treatments of sulcus vocalis and human perfect voice production are also discussed.

Keywords

Vocal foldsSulcus vocalisFluid-structure interactionFlow parameters
Type
Research Article
Information
Journal of Mechanics , Volume 34 , Issue 6 , December 2018 , pp. 791 - 800
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018 

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