Organisation/Company: CNRS
Department: Institut des sciences de la Terre
Research Field: Geosciences, Astronomy, Environmental science
Researcher Profile: Recognised Researcher (R2)
Country: France
Application Deadline: 9 Dec 2024 - 23:59 (UTC)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 1 Feb 2025
Is the job funded through the EU Research Framework Programme? Not funded by a EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description Large-scale planetary magnetic fields are generated by outflows from their liquid cores. Usually simulated within perfectly spherical geometries, using high-performance codes such as XSHELLS, the effect of topography is therefore neglected. As part of the THEIA ERC project, we propose to go beyond this perfect sphere approximation to study these topographical effects. Focusing on low-amplitude topography, these topographic effects will be studied using the spectral code XSHELLS, developed in-house by Nathanaël Schaeffer.
The XSHELLS code will be modified to include a parameterization of topographical effects, developed in the low-amplitude limit. These effects will be studied in the laminar regime and compared with the predictions of the local ToCCo code developed in-house. Particular attention will be paid to feedback on volume flow. Then, the non-linear regime and turbulent effects will be tackled, thanks to the efficiency of the XSHELLS implementation.
The Centre national de la recherche scientifique is one of the world's leading research institutions. To meet the major challenges of today and tomorrow, its scientists explore life, matter, the Universe, and the workings of human society. Internationally recognized for the excellence of its scientific work, the CNRS is a benchmark in the world of research and development, as well as for the general public.
ISTerre is a joint research unit of Université Grenoble Alpes, CNRS, USMB, IRD, and Université Gustave Eiffel, located at 1381 rue de la Piscine 38400 Saint-Martin d'Hères, on the Bourget du Lac science campus. It is part of the Observatoire des Sciences de l'Univers de Grenoble (OSUG) and the PAGE research cluster of the Université Grenoble Alpes (UGA). It employs around 300 people and has an average annual budget of €7 million. It is organized around 9 research and service teams, with the scientific objective of studying the physics and chemistry of planet Earth, with a particular focus on coupling observations of natural objects with experimentation and modeling of the associated complex processes. ISTerre also carries out solid Earth observation missions and hosts and maintains national fleets of geophysical instruments, as well as a data center.
The young researcher will be part of ISTerre's Geodynamo team, which focuses on the study of the Earth's magnetic field and the physics of the Earth's core. We use:
analog experiments (such as DTS or ZoRo)
innovative inversion techniques to determine core flow from magnetic field measurements
direct numerical simulations and theoretical models
Required Skills Python programming language
Computational fluid dynamics
Physical analysis
Knowledge of earth sciences
Teamwork
Great autonomy
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