2019-01464 - Post-Doctoral Research Visit F/M Adaptive solver and parallelization for fluid-structure interaction
Le descriptif de l’offre ci-dessous est en Anglais

Type de contrat : CDD de la fonction publique

Niveau de diplôme exigé : Thèse ou équivalent

Fonction : Post-Doctorant

A propos du centre ou de la direction fonctionnelle

The Inria Sophia Antipolis - Méditerranée center counts 37 research teams and 9 support departments. The center's staff (about 600 people including 400 Inria employees) is composed of scientists of different nationalities (250 foreigners of 50 nationalities), engineers, technicians and administrators. 1/3 of the staff are civil servants, the others are contractual. The majority of the research teams at the center are located in Sophia Antipolis and Nice in the Alpes-Maritimes. Six teams are based in Montpellier and a team is hosted by the computer science department of the University of Bologna in Italy. The Center is a member of the University and Institution Community (ComUE) "Université Côte d'Azur (UCA)".

Contexte et atouts du poste

The e ffect of explosions on structures is a major point of interest in risk and safety analysis. The impact of an explosion is two-fold: the first hazard originates from the overpressure eff ect, while the ballistic projection of solid parts can be equally dramatic. In order to simulate these phenomena, the team has developed a numerical code, CELIA3D, which solves the interaction of a compressible fluid flow (compressible Euler equations) with a deformable elastic solid. The fluid is discretized with a high-order Finite Volume method, while the solid is discretized with particle methods (Discrete Elements). The coupling uses a conservative cut-cell immersed boundary method in combination with a conservative explicit partitioned time integration scheme.
A PhD thesis has started on the above subject in November 2018. The fi rst goal is to extend the numerical scheme to the treatment of contact between solid elements. The second goal is to improve the convergence of the scheme by increasing its order of accuracy.

The project PRECIS is funded by ANR.

Mission confiée

  • Adaptive mesh refi nement and local time-stepping (12 months)
    • Bibliography review on error estimators for Euler equations and adaptive mesh refi nement library integration
    • Design of a local time-stepping scheme for the fluid scheme
    • Design of a local time-stepping scheme for the coupled system
    • Implementation and veri fication on test-cases
  • Parallelization and load balancing (6 months)
    • Evaluation of the loads of the fluid, solid and coupling solvers and of the memory transfers
    • Implementation and evaluation of the static load balancing methods (partitioned or monolithic domain decomposition)
    • Assessment of dynamic load balancing

Principales activités

  • Develop in C++ in the CELIA3d code
  • Write scientific articles
  • Present results in international conferences

Compétences

Technical skills and level required : C/C++, MPI, HPC

Languages : English

Relational skills : Capacity to communicate scientific results, Autonomy, Creativity

Avantages

  • Subsidized meals
  • Partial reimbursement of public transport costs
  • Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
  • Possibility of teleworking (after 6 months of employment) and flexible organization of working hours
  • Professional equipment available (videoconferencing, loan of computer equipment, etc.)
  • Social, cultural and sports events and activities
  • Access to vocational training
  • Social security coverage

Rémunération

Gross Salary: 2653 € brutto per month