Asymmetric glottal jet deflection: Differences of two- and three-dimensional models

Mattheus, Willy; Brücker, Christoph

doi:10.1121/1.3655893

Cited by 25 publications

(32 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This conclusion is also consistent with the very recent work of Mattheus and Br€ ucker (2011) which investigated the differences of asymmetric jet deflection in 2D and 3D models. In this work, the authors found that 3D glottal jets differ from the 2D jets due to the presence of the axis-switching phenomenon and smaller deflection angles.…”

Section: B Glottal Jet Evolutionsupporting

confidence: 92%

“…Characteristic features of phonation, including glottal jet evolution, waviness in glottal jet, mucosal wave type VF vibration and 1:1 entrainment of principal modes of vibrations have been discussed in detail. The evolution pattern of glottal jet provides support to the notion that (Zheng et al, 2011a;Mattheus and Br€ ucker, 2011) the glottal flow asymmetry is driven primarily by the postglottal vortex dynamics.…”

Section: Discussionmentioning

confidence: 53%

“…Intraglottal vorticity-velocity interaction, glottal jet structure, and its transition to turbulence are all demonstrated to be highly three-dimensional (3D) (McGowan, 1988;Neubauer et al, 2007;Triep et al, 2005;Triep and Br€ ucker, 2010;Zheng et al, 2011b). The 3D effects are clearly observed in the supraglottal region in both the experimental Triep and Br€ ucker, 2010;Khosla et al, 2007;Khosla et al, 2008) and numerical studies (Zheng et al, 2010b;Mattheus and Br€ ucker, 2011). The asymmetric flow deflection in the 3D models is also observed to be different from the 2D models.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

Xue

Mittal

Zheng

et al. 2012

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Simulation of the phonatory flow-structure interaction has been conducted in a three-dimensional, tubular shaped laryngeal model that has been designed with a high level of realism with respect to the human laryngeal anatomy. A non-linear spring-based contact force model is also implemented for the purpose of representing contact in more general conditions, especially those associated with three-dimensional modeling of phonation in the presence of vocal fold pathologies. The model is used to study the effects of a moderate (20%) vocal-fold tension imbalance on the phonatory dynamics. The characteristic features of phonation for normal as well as tension-imbalanced vocal folds, such as glottal waveform, glottal jet evolution, mucosal wave-type vocal-fold motion, modal entrainment, and asymmetric glottal jet deflection have been discussed in detail and compared to established data. It is found that while a moderate level of tension asymmetry does not change the vibratory dynamics significantly, it can potentially lead to measurable deterioration in voice quality.

show abstract

Section: B Glottal Jet Evolutionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

Xue

Mittal

Zheng

et al. 2012

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…The experiments were performed by using the geometry of the rectangular glottal gap as the base, which is moving at the end of the motion cycle in the reference case to a full closure and in the leaky case leaving some gaps at both ends of the model. Mattheus and Brücker (2011) showed that such a rectangular glottal gap (slit-like gap) produces vortex trains with rod-like structures that are mostly aligned in lengthwise direction of the folds, Fig. 12.…”

Section: Hg(+) Hg(−)mentioning

confidence: 99%

On the jet formation through a leaky glottis

Kirmse

Brücker

2014

Journal of Fluids and Structures

Self Cite

View full text Add to dashboard Cite

This is the submitted version of the paper.This version of the publication may differ from the final published version. Permanent repository link: AbstractThe present experimental study aims at analyzing the jet formation of the glottal jet flow using a model of a leaky glottis. Experiments were performed in a flow channel with dynamic models of the vocal folds in order to measure the glottal waveform and the velocity distribution in the supraglottal region using High Speed Particle Image Velocimetry (HSPIV). Proper Orthogonal Decomposition (POD) of the vortex Q-criterion was performed in order to detect the energetically most significant large-scale vortex structures and their appearance in the jet flow. The spectral analysis of the glottal waveforms results in an increased spectral decay with more prominent peaks at higher frequencies in the case of a leaky glottis compared to a completely closing reference case. Vortex induced fluctuation frequencies have similar spectral content in both cases as they appear as trains of vortex packets in a regular manner over the glottal cycle. However, when removing the false vocal folds in the leaky glottis model, coherence of vortex generation is lost over the motion cycle. Thus, the presence of the false vocal folds retains most of the vortex induced characteristics in the source spectrum even when the vocal folds do not close fully.

show abstract

“…These include studies with fixed vocal folds (e.g. [12,13,14,15]), forced vocal fold oscillation [16,17,6,18,19,20,21,22,23] and models with the airflow fully coupled to elastic tissue oscillations [24,25,26,27,28,29,30]. Only a few of these computational studies [24,12,14,15,22] solve the flow field in 3D, and most of them on a static geometry.…”

Section: Previous Work In the Fieldmentioning

confidence: 99%

Computational aeroacoustics of human phonation

Šidlof

Zörner

2013

EPJ Web of Conferences

View full text Add to dashboard Cite

The current paper presents a CFD model of flow past vibrating vocal folds coupled to an acoustic solver, which calculates the sound sources from the flow field in a hybrid approach. The CFD model is based on the numerical solution of 3D Navier-Stokes equations on a time-dependent domain, solved by cell-centered finite volume method. To capture the fine turbulent scales important for the acoustic source calculations, the equations are discretized and solved on large computational meshes up to 3.2M elements. The CFD simulations were run in parallel using domain decomposition method and OpenMPI implementation of the MPI standard. Aeroacoustic simulations are calculated in a separate step by Lighthill's acoustic analogy, which determines the acoustic sources based on the fluid field. This is done with the research code CFS++ which employs the finite element method (FEM).

show abstract

Asymmetric glottal jet deflection: Differences of two- and three-dimensional models

Cited by 25 publications

References 9 publications

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

On the jet formation through a leaky glottis

Computational aeroacoustics of human phonation

Contact Info

Product

Resources

About