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S. Schoder, M. Kaltenbacher, K. Roppert:
"Helmholtz's Decomposition applied to Aeroacoustics";
in: "25rd AIAA/CEAS Aeroacoustics conference", AIAA, 2019, ISBN: 978-1-62410-588-3.

We discuss the decomposition of a compressible velocity field into vortical and compressible
structures and use it as a powerful tool during the post-processing of direct aeroacoustic
simulations. In particular, different formulations of the decomposition are presented and the
superiority of the vector potential formulation of Helmholtz´s decomposition is demonstrated.
Finally, the decomposition is applied to a compressible flow field over a rectangular cavity at
Mach 0.8.

CAA

http://dx.doi.org/10.2514/6.2019-2561