Christophe Geuzaine, Professor, University of Liege

Jizu Huang, Associate Professor

Non-reflecting boundary conditions and domain decomposition methods for aeroacoustics

16:00-17:00 March 6(Thursday), Zoom Meeting ID: 817 9878 4059, Passcode: 258403 Geuzaine Christophe

This talk is devoted to the numerical solution of high-frequency aeroacoustic problems of industrial relevance. First, we will present recent advances on non-reflecting boundary techniques that provide local approximations to the Dirichlet-to-Neumann operator for convected and heterogeneous time-harmonic wave propagation problems [1]. We will then show how to adapt a generic domain decomposition framework to flow acoustics, based on these newly designed transmission conditions, and highlight the benefit of the approach on the simulation of three-dimensional noise radiation of a high by-pass ratio turbofan engine intake [2].

[1] Marchner, P., Antoine, X., Geuzaine, C., & Bériot, H. Construction and numerical assessment of local absorbing boundary conditions for heterogeneous time-harmonic acoustic problems. SIAM Journal on Applied Mathematics, 82(2), 476-501, 2022.

[2] Marchner, P., Bériot, H., Le Bras, S., Antoine, X., & Geuzaine, C. A domain decomposition solver for large scale time-harmonic flow acoustics problems. SIAM Journal on Scientific Computing, Accepted for publication, 2025.