About us
Espace utilisateur
Education
INSTN offers more than 40 diplomas from operator level to post-graduate degree level. 30% of our students are international students.
Professionnal development
Professionnal development
Find a training course
INSTN delivers off-the-self or tailor-made training courses to support the operational excellence of your talents.
Human capital solutions
At INSTN, we are committed to providing our partners with the best human capital solutions to develop and deliver safe & sustainable projects.
Thesis
Home   /   Post Doctorat   /   Implementation and study of compressible multiphase models and numerical schemes

Implementation and study of compressible multiphase models and numerical schemes

Engineering sciences Mathematics - Numerical analysis - Simulation

Abstract

The proposed post-doctoral research concerns the safety of new-generation nuclear reactors, with a more general focus on understanding and simulating the consequences of energy transients in the post-accident regime. It consists of implementing and studying models and numerical schemes for compressible multiphase flows of increasing complexity in a C++ code.
The code called SCONE and developed at LMAG should allow the simulation of the interaction between corium (molten reactor core with surrounding structures) and sodium.
The complexity of the phenomena involved imposes strong modeling and resolution constraints. Currently, a compressible model with N phases in pressure equilibrium is operational with a semi-conservative resolution on a staggered grid. This numerical scheme is not completely satisfactory for strong shocks. One solution is to rely on recognized schemes for these cases such as collocated schemes like Godunov type ones. The first step of the post doctorate is to develop this approach for a simple model. Ultimately, the targeted model is a multiphasic model fully out of equilibrium. Depending on the progress of the work, the adaptation of schemes on staggered grids to this model will be possible by taking as reference the results of the previously validated collocated schemes.
Overally this post-doctoral position will allow the study of numerical schemes and multiphase models in a complex N-phase Framework and more generally to develop/consolidate expertise in transient numerical methods for complex systems.

Laboratory

Département de Technologie Nucléaire
Service Mesures et modélisation des Transferts et des Accidents graves
Laboratoire de modélisation des accidents graves
Top envelopegraduation-hatlicensebookuserusersmap-markercalendar-fullbubblecrossmenuarrow-down