bComputational acoustic modeling laboratory, CIRMMT, McGill University
The sound generation behavior of a single-reed instrument can be determined from its aeroacoustic characteristics. Computational aeroacoustics (CAA) modeling offers a mean to analyze the aeroacoustics behavior of such a system. The lattice Boltzmann method (LBM) models fluid on a mesoscopic level and has certain advantages over traditional Navier-Stokes approaches in solving CAA problems. In this study, we present results from an aeroacoustic analysis of a 2D single-reed mouthpiece system using an open- source, parallelized lattice Boltzmann solver called Palabos. A variety of functionalities and components are investigated, including the parallelization, the grid refinement, the moving boundary, and the non-reflecting boundary condition, which demonstrates the versatility of Palabos. Different mouthpiece geometries are tested with both static and moving reeds. The nonlinear characteristics of the mouthpiece-reed system derived from this study are then compared with the theoretical quasi-static flow model.
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