title: Towards aeroacoustic sound generation by flow through porous media.
abstract: In this work, we present single-step aeroacoustic calculations using the Lattice Boltzmann method (LBM). Our application case consists of the prediction of an acoustic field radiating from the outlet of a porous media silencer. It has been proved that the LBM is able to simulate acoustic wave generation and propagation. Our particular aim is to validate the LBM for aeroacoustics in porous media. As a validation case, we consider a spinning vortex pair emitting sound waves as the vortices rotate around a common centre. Non-reflective boundary conditions based on characteristics have been adopted from Navier-Stokes methods and are validated using the time evolution of a Gaussian pulse. We show preliminary results of the flow through the porous medium.
authors.affiliation: German Research School for Simulation Sciences and RWTH Aachen University, 52062 Aachen, Germany. m.hasert@grs-sim.de
authors.forename: Manuel
authors.initials: M
authors.lastname: Hasert
authors.forename: Joerg
authors.initials: J
authors.lastname: Bernsdorf
authors.forename: Sabine
authors.initials: S
authors.lastname: Roller