Juliette Chabassier is defending her habilitation (HDR) Wednesday, June 26th at the University of Pay and Pays de l’Adour. French Title: Modélisation physique et simulation numérique d’instruments de musique French abstract: Modéliser et simuler le fonctionnement acoustique et vibratoire des instruments de musique vise des applications aussi variées que la…
Florian Faucher got awarded the 2024 EAIP Young Scientist Award of the Eurasian Association on Inverse Problems (EAIP) during the 11th International Conference “Inverse Problems: Modeling and Simulation”. https://www.eurasianip.org/eaip-awards/eaip-young-scientist-award.html
Dr Janosch Preuss from University College London is visiting Makutu from May 20th to 25th. He will give the following seminar: A hybridized Nitsche method for acoustic metamaterials abstract: Acoustic metamaterials have some seemingly magical properties. For example, they can be used to render objects invisible to incoming sound waves…
Prof. Maarten V. de Hoop from Rice University is visiting Makutu on March 18th and 19th. He will give the following seminar: Geometry and seismology on gas giants, and inverse problems abstract: It is often useful to treat planets as geometric objects where the geometry is defined so that the…
A preprint on HDG method for anisotropy is available online:Numerical investigation of stabilization in the Hybridizable Discontinuous Galerkin method for linear anisotropic elastic equation, arXiv preprint 2403.02862, pp. 1–34, 2024. The associated research report (79 pages) is also available on Hal: On the implementation of Hybridizable Discontinuous Galerkin discretization for…
A preprint is available online:H. Pham, F. Faucher, D. Fournier, H. Barucq, and L. Gizon. Assembling algorithm for Green’s tensors and absorbing boundary conditions for Galbrun’s equation in radial symmetry, arXiv preprint 2401.17080, pp. 1–33, 2024. Abstract Solar oscillations can be modeled by Galbrun’s equation which describes Lagrangian wave displacement in…
Authors : Hélène Barucq, M’Barek Fares (Cerfacs), Carola Kruse (Cerfacs), Sébastien Tordeux Research article : Hélène Barucq, M’Barek Fares, Carola Kruse, Sébastien Tordeux, Sparsified discrete wave problem involving a radiation condition on a prolate spheroidal surface, IMA Journal of Numerical Analysis, Volume 41, Issue 1, January 2021, Pages 315–343 (link to the…
Authors : Hélène Barucq, Nathan Rouxelin (Former PhD student of Makutu), Sébastien Tordeux Article published in : Low-order Prandtl-Glauert-Lorentz based Absorbing Boundary Conditions for solving the convected Helmholtz equation with Discontinuous Galerkin methods, Journal of Computational Physics, Volume 468, 2022, (link to the journal) Many wave propagation problems are set in unbounded…
The internal geometry of a wind instrument can be estimated from acoustic measurements. For woodwind instruments, this involves characterizing the inner shape (bore) but also the side holes (dimensions and location). In this study, the geometric parameters are recovered by a gradient-based optimization process, which minimizes the deviation between simulated…
Contributors: Alexis Thibault (Ph. D. student), Henri Boutin (STMS UMR 9912), Juliette Chabassier, Thomas Hélie (STMS UMR 9912) Thermoviscous acoustic propagation in a tube with corrugated isothermal rigid walls is considered. At long wavelengths, it amounts to a 1D transmission line equation, in which the coefficients depend on the solution…
