This title appears in the Scientific Report : 2015 

A direct-hybrid method for computational aeroacoustics
Schlottke-Lakemper, Michael (Corresponding author)
Cheng, Hsun-Jen / Pauz, Vitali / Meinke, Matthias H. / Schroeder, Wolfgang
Jülich Supercomputing Center; JSC
21st AIAA/CEAS Aeroacoustics Conference, Dallas, TX (USA), 2015-06-22 - 2015-06-26
Conference Presentation
Computational Science and Mathematical Methods
In this work, a highly scalable numerical method is presented that allows to compute the aerodynamic sound from the flow field for large-scale problems. The acoustic perturbation equations are solved by a high-order discontinuous Galerkin method and by using the acoustic source terms obtained from an approximate solution of the Navier-Stokes equations. Both solvers operate on the same hierarchical Cartesian grid. This direct-hybrid method is validated by monopole and pressure pulse simulations and is used to compute the aeroacoustics of a turbulent mixing layer. The results indicate that the new method is capable of efficiently predicting the acoustic field and show that it is suitable for highly parallel simulations.