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

Willy Mattheus | Zendy; Christoph Brücker | Zendy

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

Author(s) -

Willy Mattheus,

Christoph Brücker

Publication year - 2011

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.3655893

Subject(s) - body orifice , phonation , deflection (physics) , physics , mechanics , vortex , entrainment (biomusicology) , optics , jet (fluid) , orifice plate , acoustics , classical mechanics , engineering , mechanical engineering , medicine , rhythm , audiology

Flow is studied through a channel with an oscillating orifice mimicking the motion of the glottal-gap during phonation. Simulations with prescribed flow and wall-motion are carried out for different orifice geometries, a 2D slit-like and a 3D lens-like one. Although the jet emerges from a symmetric orifice a significant deflection occurs in case of the slit-like geometry, contrary to the 3D lens-like one. The results demonstrate the dependency of jet entrainment and vortex dynamics on the orifice geometry and the interpretation of asymmetric jet deflection with regard to the relevance of the Coanda effect in the process of human phonation.

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