Vortex dipolar structures in a rigid model of the larynx at flow onset

Chisari, Nora Elisa; Artana, Guillermo; Sciamarella, Denisse

doi:10.1007/s00348-010-0941-x

Cited by 14 publications

(26 citation statements)

References 27 publications

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“…described flow dynamics agree well with the flow visualizations and numerical simulation of Chisari et al [16].…”

Section: CLsupporting

confidence: 84%

“…In order to showcase the validity of the computational method for the laryngeal flow simulations, the experiment by Chisari et al [16] was reproduced using the current computational method. The test case was composed of two consecutive static constrictions, which approximate the TVF and P^VF gaps.…”

Section: Validation Of the Computational Methodsmentioning

confidence: 99%

“…Particle image velocimetry (PIV) measurements of the glottal flow using flexible and static models of TVFs demonstrate that the FVFs could affect the glottal jet [16][17][18]. Furthermore, the widely accepted understanding of the FVFs is that the normal positioning of the FVFs in the larynx reduces the transglottal resistance compared to the laryngés without this pair of tissues.…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

Farahani

Mousel

Alipour

et al. 2013

Journal of Biomechanical Engineering

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The false vocal folds are hypothesized to affect the laryngeal flow during phonation. This hypothesis is tested both computationally and experimentally using rigid models of the human larynges. The computations are performed using an incompressible Navier-Stokes solver with a second order, sharp, immersed-boundary formulation, while the experiments are carried out in a wind tunnel with physiologic speeds and dimensions. The computational flow structures are compared with available glottal flow visualizations and are employed to study the vortex dynamics of the glottal flow. Furthermore, pressure data are collected on the surface of the laryngeal models experimentally and computationally. The investigation focuses on three geometric features: the size of the false vocal fold gap; the height between the true and false vocal folds; and the width of the laryngeal ventricle. It is shown that the false vocal fold gap has a significant effect on glottal flow aerodynamics, whereas the second and the third geometric parameters are of lesser importance. The link between pressure distribution on the surface of the larynx and false vocal fold geometry is discussed in the context of vortex evolution in the supraglottal region. It was found that the formation of the starting vortex considerably affects the pressure distribution on the surface of the larynx. The interaction of this vortex structure with false vocal folds creates rebound vortices in the laryngeal ventricle. In the cases of small false vocal fold gap, these rebound vortices are able to reach the true vocal folds during a time period comparable with one cycle of the phonation. Moreover, they can create complex vorticity patterns, which result in significant pressure fluctuations on the surface of the larynx.

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“…described flow dynamics agree well with the flow visualizations and numerical simulation of Chisari et al [16].…”

Section: CLsupporting

confidence: 84%

Section: Validation Of the Computational Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

A Numerical and Experimental Investigation of the Effect of False Vocal Fold Geometry on Glottal Flow

Farahani

Mousel

Alipour

et al. 2013

Journal of Biomechanical Engineering

View full text Add to dashboard Cite

show abstract

“…When the cameras are placed on either side of the light sheet, the included angle is not constant across the field of view and hence, the measurement uncertainty for the out-of-plane component is not constant. For the rather narrow field of view in this study (5 • ), this variation was of no significance.…”

Section: Flow Velocimetry Devicesmentioning

confidence: 69%

“…being mainly two-dimensional [5,30], most investigations concur on the existence of highly three-dimensional features for the glottal jet (see Table 1). So far, characterizations of three-dimensional features of the glottal jet have been performed with classical (two-dimensional) Particle Image Velocimetry (2D-PIV), a technique which provides the projection of the velocity vector into a flow slice.…”

mentioning

confidence: 99%