Session HA: Bio-Fluid Dynamics: Vocal and Oral
1:20 PM–2:25 PM, Monday, November 21, 2005
Hilton Chicago Room: International Ballroom South
Chair: Timothy Wei, Rutgers University
Abstract ID: BAPS.2005.DFD.HA.2
Abstract: HA.00002 : Computational aeroacoustics of human vocal tract model flow
1:33 PM–1:46 PM
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Abstract 
Authors:
Jungsoo Suh
Steven Frankel
Luc Mongeau
Michael Plesniak
(Purdue University)
Computational aeroacoustics studies of flow through the human vocal tract, here modeled as a planar channel with an orifice, hence referred to as the glottis, are conducted using large eddy simulation (LES). Comparisons between LES predictions and experimental wall pressure measurements and particle-imaging-velocimetry flow fields will be presented. The compressible Navier-Stokes equations are accurately and efficiently integrated for the low Mach number flow through the use of an additive semi-implicit Runge-Kutta method and high-order compact finite-difference schemes for spatial discretization. Characteristic-based non-reflecting boundary conditions are used together with an exit zone in the context of a multi-block approach. An acoustic analogy based on the Ffowcs Williams--Hawkings equation will be applied to decompose the near-field acoustic source into its monopole, dipole, and quadrupole contributions to assess glottal geometry effects on far-field sound.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.DFD.HA.2