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Dear Mathias,

Yes, I think that wall-modelled LES approach would be ok for this purpose.

Coming back to the question about compressibility. In literature I found the following statement:

The latttice-Boltzmann method is well-suited for the aeroacoustics applications since it is a Lagrangian
method based on a stream-and-collide scheme, and is inherently unsteady and compressible and thus physically deals with sound pressure waves. (https://arc.aiaa.org/doi/10.2514/6.2016-2969)

How does this relate to what you wrote about the possibility of performing analyzes as incompressible?

Regards,
Adam

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Dear Mathias,

Thank you for quick reply.

I am not sure if I understand your answer. I have some experience with N-S (RANS/URANS) solvers, but the LBM method is completely new for me.

I thought that when we consider the aeroacoustic simulation in LBM method, we solve both the flow and acoustic propagation (direct CAA approach). The question is how it is possible if you make an assumption of incompressible flow? Or maybe I miss something?

Specifically, I am interested in predicting noise generated by a quad-copter.

Regards,
Adam

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