Boundary Slip Effect on Acoustic Scattering from a Rigid Cylinder via Immersed Boundary-Lattice Boltzmann Method

摘要

Acoustic scattering problems have been main topics in the acoustic community. Most previous work assumed that no-slip on the surface of the solid. Nowadays, more and more studies have shown the existence of boundary slip and its impact on acoustics properties. In this paper, acoustic scattering from a rigid cylinder with boundary slip on surface is carried out by the force correction-based IB-LBM. The boundary slip on acoustic scattering from the rigid cylinder is investigated under the condition of different wave numbers. Numerical result shows that: Different wave numbers affect the energy distribution of sound pressure, and different slip lengths shift the phase and the amplitude of the waveform.