High-resolution CFD simulation of flow in glottis using LES
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00518415" target="_blank" >RIV/61388998:_____/19:00518415 - isvavai.cz</a>
Result on the web
<a href="http://www.aql2019.conference.mcgill.ca/" target="_blank" >http://www.aql2019.conference.mcgill.ca/</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
High-resolution CFD simulation of flow in glottis using LES
Original language description
A high-resolution CFD simulation of airflow through the larynx in human phonation was performed using the Large Eddy Simulation approach. The model uses a simplified 3D geometry with forced symmetric oscillation of the vocal folds and static ventricular folds. The domain was meshed in such a way, that the boundary layer in the convergent glottal channel and intraglottal space is well captured, thus avoiding use of special wall-treatment models. Computational grids used in the simulation range from two to five million elements. The velocity fields, pressure distribution and flow waveforms are compared for different computational meshes. Particular attention is paid to regions, where the major aeroacoustic sources are located, as known from previous studies using a laminar flow model. The results show that the flowrate waveform simulated by LES significantly differs from the results of the laminar model due to SGS viscosity, which exceeds molecular viscosity by almost one order of magnitude in the intraglottal space, thus reducing the flow rate. nn
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10307 - Acoustics
Result continuities
Project
<a href="/en/project/GA19-04477S" target="_blank" >GA19-04477S: Modelling and measurements of fluid-structure-acoustic interactions in biomechanics of human voice production</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů