SPH simulations of aeroacoustic problems in vocal tracts
WEI Jianguo1, HAN Jiang2, HOU Qingzhi2, WANG Song2, DANG Jianwu2,3
1. School of Computer Software, Tianjin University, Tianjin 300350, China;
2. School of Computer Science and Technology, Tianjin University, Tianjin 300350, China;
3. School of Information Science, Japan Advanced Institute of Science and Technology, Ishikawa 923-1292, Japan
Abstract：Simulation of human sound wave propagation need to take into account the moving boundaries and fluid flow within the vocal tract for accurate realistic models. Traditional mesh-based methods that are widely used to study human sound production have many problems due to mesh reconstruction and distortion, so they are not as effective as meshless methods. The aeroacoustic wave equations in the Eulerian framework are transformed to the governing equations for wave propagation in the Lagrangian form and discretized using the smoothed particle hydrodynamics (SPH) method. The accuracy and reliability of SPH for wave propagation in a static media are shown by comparisons with finite difference time domain (FDTD) results. This method is validated against the Doppler effect based theoretical solutions for one-and two-dimensional aeroacoustics to verify the ability of SPH to solve complex aeroacoustic problems.
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