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Accueil du site > Évènements > Séminaires > Séminaires LMA > Archives LMA > 2021

Mardi 21 septembre 2021 / LMA

publié le

Séminaire LMA

Time-domain numerical modeling of acoustic wave propagation in rigid porous media

Orateur : Ilyes Moufid / doctorant ISAE-Supaéro

Abstract : The equivalent fluid model (EFM) describes the acoustic behaviour of rigid porous media with an effective density and compressibility. These physical quantities are complex-valued frequency-dependent functions that can be irrational, cf the Johnson-Champoux-Allard-Pride-Lafarge (JCAPL) model. The system of equations derived from the EFM can thus involve fractional derivatives in the time domain. In this talk, an investigation of the JCAPL-EFM based on oscillatory-diffusive representations is carried out in order to build a stable and tractable approximated model for numerical simulations in the time domain.

Date et lieu : le 7 septembre 2021 à 11h00, amphithéâtre F. Canac, LMA (+ Zoom)