Mardi 16 janvier 2024 à 11h00 / Amphithéâtre François Canac, LMA
Abstract: In computational aeroacoustics, time-domain impedance boundary conditions (TDIBCs) can be employed to model a locally reacting sound absorbing material. The broad objective of this work is to achieve accurate noise level predictions using realistic physical impedance models, which lead to TDIBCs that are non-local in time.
The first part of the talk will focus on the derivation of time-local realizations of linear physical impedance models; two families of realizations will be presented, a dissipative and a conservative one. The second part of the talk will focus on the high-order discretization of the linearized Euler equations with a possibly non-linear TDIBC.