STAGE (Internship) in learning non local structure preserving closure for Vlasov equation
Contract type : Internship agreement
Level of qualifications required : Graduate degree or equivalent
Fonction : Internship Research
Assignment
The Vlasov-BGK equation used to simulate the dynamics of weakly or strongly collisional plasma is a very expensive PDE to solve, as it is posed in 6 dimensions. In strongly collisional regimes, the Euler and Navier-Stokes approximations are very effective in reducing computation time. In intermediate regimes, work has shown that non-local closures in space are relevant. The first step was to build a closure based on CNN. The results were positive, but long-time instability appeared. To solve this problem, we propose to change the architecture, moving towards Greenet-type neural operators and imposing entropy growth in the learned closure. Once this has been achieved, we propose to build a scheme that preserves entropy growth.
Main activities
-read the papers on learning to close
-read papers on neural operators
-generate data with kinetic code
-test different architectures
-validate the chosen architecture on classisque test cases
Skills
-python
-numerical methods
-basics of ML
Benefits package
- Restauration subventionnée
- Transports publics remboursés partiellement
- Congés: 7 semaines de congés annuels + 10 jours de RTT (base temps plein) + possibilité d'autorisations d'absence exceptionnelle (ex : enfants malades, déménagement)
- Possibilité de télétravail (après 6 mois d'ancienneté) et aménagement du temps de travail
- Équipements professionnels à disposition (visioconférence, prêts de matériels informatiques, etc.)
- Prestations sociales, culturelles et sportives (Association de gestion des œuvres sociales d'Inria)
- Accès à la formation professionnelle
- Sécurité sociale
Remuneration
4.35 €/hour
General Information
- Theme/Domain :
Earth, Environmental and Energy Sciences
Scientific computing (BAP E) - Town/city : strasbourg
- Inria Center : Centre Inria de l'Université de Lorraine
- Starting date : 2025-02-17
- Duration of contract : 6 months
- Deadline to apply : 2024-12-04
Warning : you must enter your e-mail address in order to save your application to Inria. Applications must be submitted online on the Inria website. Processing of applications sent from other channels is not guaranteed.
Instruction to apply
Defence Security :
This position is likely to be situated in a restricted area (ZRR), as defined in Decree No. 2011-1425 relating to the protection of national scientific and technical potential (PPST).Authorisation to enter an area is granted by the director of the unit, following a favourable Ministerial decision, as defined in the decree of 3 July 2012 relating to the PPST. An unfavourable Ministerial decision in respect of a position situated in a ZRR would result in the cancellation of the appointment.
Recruitment Policy :
As part of its diversity policy, all Inria positions are accessible to people with disabilities.
Contacts
- Inria Team : MACARON
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Recruiter :
Franck Emmanuel / emmanuel.franck@inria.fr
About Inria
Inria is the French national research institute dedicated to digital science and technology. It employs 2,600 people. Its 200 agile project teams, generally run jointly with academic partners, include more than 3,500 scientists and engineers working to meet the challenges of digital technology, often at the interface with other disciplines. The Institute also employs numerous talents in over forty different professions. 900 research support staff contribute to the preparation and development of scientific and entrepreneurial projects that have a worldwide impact.