TY - GEN
T1 - Galbrun based numerical scheme to compute time-harmonic scattering in an arbitrary mean flow
AU - Millot, F.
AU - Pernet, S.
AU - Peynaud, E.
AU - Bonnet-Ben Dhia, A. S.
AU - Mercier, J. F.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - For the numerical simulation of time-harmonic acoustic scattering in a complex geom- etry, in presence of an arbitrary mean flow, the main difficulty is the coexistence and the coupling of two very different phenomena: acoustic propagation and convection of vortices. We consider a linearized formulation coupling an augmented Galbrun equation (for the perturbation of displacement) with a time-harmonic convection equation (for the vortices). In addition, the computational region is truncated by means of Perfectly Matched Layers at artificial boundaries. We implemented a hybrid numerical method which consists in coupling finite elements for the Galbrun equation and a Discontinuous Galerkin scheme for the convection equation. Finally, numerical tests show the efficiency of the method.
AB - For the numerical simulation of time-harmonic acoustic scattering in a complex geom- etry, in presence of an arbitrary mean flow, the main difficulty is the coexistence and the coupling of two very different phenomena: acoustic propagation and convection of vortices. We consider a linearized formulation coupling an augmented Galbrun equation (for the perturbation of displacement) with a time-harmonic convection equation (for the vortices). In addition, the computational region is truncated by means of Perfectly Matched Layers at artificial boundaries. We implemented a hybrid numerical method which consists in coupling finite elements for the Galbrun equation and a Discontinuous Galerkin scheme for the convection equation. Finally, numerical tests show the efficiency of the method.
UR - https://www.scopus.com/pages/publications/84883108267
M3 - Conference contribution
AN - SCOPUS:84883108267
SN - 9781600869433
T3 - 17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference)
BT - 17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference)
T2 - 17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference)
Y2 - 5 June 2011 through 8 June 2011
ER -