aMcGill University
bComputational acoustic modeling laboratory, CIRMMT, McGill University
Abstract :
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.