Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model.

Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Research Abstract Details 

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Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Abstract Text:

Jungsoo Suh,Steven H Frankel,

Large eddy simulation (LES)-based computational aeroacoustics techniques were applied to a static model of the human glottis, idealized here as a planar channel with an orifice, to study flow-acoustic interactions related to speech. Rigid models of both converging and diverging glottal passages, each featuring a 20 deg included angle and a minimal glottal diameter of 0.04 cm, with an imposed transglottal pressure of 15 cm H2O, were studied. The Favre-filtered compressible Navier-Stokes equations were integrated for this low-Mach-number flow using an additive semi-implicit Runge-Kutta method and a high-order compact finite-difference scheme with characteristic-based nonreflecting boundary conditions and a multiblock approach. Flow asymmetries related to the Coanda effect and transition to turbulence, as well as the far-field sound, were captured. Acoustic-analogy-based far-field sound predictions were compared with direct simulations and showed that dipole sources, arising from unsteady flow forces exerted on the glottal walls, are primarily responsible for the tonal sound observed in the divergent glottis case.

Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Publishing Authors By Initials

J Suh,SH Frankel,

For similar natural sciences: physics: acoustics: sound research abstracts see: natural sciences: physics: acoustics: sound research

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Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: The Journal of the Acoustical Society of America

VOLUME: 121

Page Numbers: 3728-39

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 3

MONTH: Jun

YEAR: 2007

Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Information

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LANGUAGE: eng

NlmUniqueID: 7503051

Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model. Keywords Mesh Terms:

KEYWORDS: Sound

MESH TERMS: physiology

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Grant and Affiliation Information for Numerical simulation of turbulence transition and sound radiation for flow through a rigid glottal model.

AFFILIATION: Maurice J. Zucrow Laboratories, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907-2014, USA. suhj@ecn.purdue.edu

Country: United States

AGENCY: United States NIDCD

GRANT: R01 DC 05788

ACRONYM: DC

MEDLINETA: J Acoust Soc Am

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