Title: HPC pre-exascale modeling of seismo-acoustic wave propagation
Date: 2023-03-23 19:16
Job_Location: Laboratoire de Mécanique et d'Acoustique de Marseille
Job_Duration: 24 mois + 8 à 15 mois additionnels
The position is supported by the PEPR NumPex grant and the HORIZON-JU-RIA grant ChEESE-2P (2023-26) with 16 (academic and industrial) partners throughout Europe. Some of the general objectives of ChEESE-2P are to (i) enhance 11 open-source Solid Earth community flagship codes in terms of performance, scalability, deployment, and portability across current pre-exascale systems and emerging hardware architectures; (ii) farm a new generation of 9 pilot demonstrators and run 15 derived simulation cases addressing the exascale computational challenges (capability/capacity/UC) and enabling services on socially-relevant aspects of geohazards like urgent computing for disaster response, early warning, and hazard assessment. Four of the fifteen simulation cases will be considered as full-scale Scientific Grand Challenges. CNRS, and more specifically LMA, is largely involved in this EU project, since it coordinates one of the 5 workpackages (Farming pilot demonstrators) and is involved in 22 tasks. The SPECFEM3D code, based on a spectral-element method and partly developed at LMA (https://specfem.org), is fully integrated in the two above-mentioned objectives. The candidate will help prepare the SPECFEM3D code for future exascale infrastructures.
- Improve general usability for the SPECFEM3D code and associated workflow including performance analysis and deployment of quality assessment tools.
- Participate in the inclusion of novel physics models (attenuation, gravity) in the code and perform validation tests.
- Main task: Implement one of the Scientific Grand Challenges (SGC) of ChEESE-2P using large-scale pre-exascale resources. The SGC will focus on 3D numerical modeling of seismo-acoustic wave propagation in the Bay of Hyères (Mediterranean Sea, France) up to the frequency 100 Hz, in order to assess noise pollution and seismic risks induced by the detonation of large unexploded ordnances. Meshing realistic marine environments is one of the challenges the candidate will face, since it may lead to meshes comprising several billions of elements.
- Attend the ChEESE-2P meetings, participate in the writing of the mandatory deliverables of the project
- Communicate: publications in high-ranked scientific journals, presentations in international congresses.
The work will be carried out in close collaboration with specialists in HPC modeling and specialists in seismo-acoustics in the marine environment.