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Computational aeroacoustics based on the lattice Boltzmann method. (Chinese. English summary) Zbl 1299.76205

Summary: The lattice Boltzmann method (LBM) is studied and extended into computational aeroacoustics (CAA), and a non-equilibrium extrapolation scheme for LBM is applied to treating wall boundary and an absorbing boundary condition is used to prevent wave reflection at the far field boundary. Firstly, LBM code is validated by simulating the lid-driven cavity flow. Then, several benchmark problems in CAA are numerically studied and comparisons between LBM and conventional four-order dispersion-relation-preserving scheme are also performed. The ability of LBM to simulate these problems is tested, which helps to further study aerodynamic noise from complex bodies. It is demonstrated that the calculated results by LBM for benchmark problems are in good agreement with the exact solution although the standard LBM has two-order accuracy in space and time, and LBM is an effective and feasible method for aero-acoustical calculations.

MSC:

76M28 Particle methods and lattice-gas methods
76P05 Rarefied gas flows, Boltzmann equation in fluid mechanics
76Q05 Hydro- and aero-acoustics
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