TY - JOUR
T1 - Anisotropic minimum dissipation subgrid-scale model in hybrid aeroacoustic simulations of human phonation
AU - Lasota, Martin
AU - Šidlof, Petr
AU - Maurerlehner, Paul
AU - Kaltenbacher, Manfred
AU - Schoder, Stefan
PY - 2023/2
Y1 - 2023/2
N2 - This article deals with large-eddy simulations of three-dimensional incompressible laryngeal flow followed by acoustic simulations of human phonation of five cardinal English vowels, /ɑ, æ, i, o, u/. The flow and aeroacoustic simulations were performed in OpenFOAM and in-house code openCFS, respectively. Given the large variety of scales in the flow and acoustics, the simulation is separated into two steps: (1) computing the flow in the larynx using the finite volume method on a fine moving grid with 2.2 million elements, followed by (2) computing the sound sources separately and wave propagation to the radiation zone around the mouth using the finite element method on a coarse static grid with 33 000 elements. The numerical results showed that the anisotropic minimum dissipation model, which is not well known since it is not available in common CFD software, predicted stronger sound pressure levels at higher harmonics, and especially at first two formants, than the wall-adapting local eddy-viscosity model. The model on turbulent flow in the larynx was employed and a positive impact on the quality of simulated vowels was found.
AB - This article deals with large-eddy simulations of three-dimensional incompressible laryngeal flow followed by acoustic simulations of human phonation of five cardinal English vowels, /ɑ, æ, i, o, u/. The flow and aeroacoustic simulations were performed in OpenFOAM and in-house code openCFS, respectively. Given the large variety of scales in the flow and acoustics, the simulation is separated into two steps: (1) computing the flow in the larynx using the finite volume method on a fine moving grid with 2.2 million elements, followed by (2) computing the sound sources separately and wave propagation to the radiation zone around the mouth using the finite element method on a coarse static grid with 33 000 elements. The numerical results showed that the anisotropic minimum dissipation model, which is not well known since it is not available in common CFD software, predicted stronger sound pressure levels at higher harmonics, and especially at first two formants, than the wall-adapting local eddy-viscosity model. The model on turbulent flow in the larynx was employed and a positive impact on the quality of simulated vowels was found.
KW - Phonetics
KW - Human voice
KW - Acoustical properties
KW - Aeroacoustics
KW - Larynx
KW - Vocel systems
KW - Turbulence simulations
KW - Turbulent flows
KW - Viscosity
KW - Subgrid-scale model
UR - https://doi.org/10.1121/10.0017202
UR - http://www.scopus.com/inward/record.url?scp=85148419008&partnerID=8YFLogxK
U2 - 10.1121/10.0017202
DO - 10.1121/10.0017202
M3 - Article
SN - 0001-4966
VL - 153
SP - 1052
EP - 1063
JO - The Journal of the Acoustical Society of America
JF - The Journal of the Acoustical Society of America
IS - 2
ER -