Christopher Nahed

This fully funded PhD opportunity at the French Alternative Energies and Atomic Energy Commission (CEA) focuses on multiphysics simulation, applied mathematics, numerical analysis, and scientific computing. The research is situated within CEA’s nuclear engineering and fuel physics applications, with supervision based at CEA Saclay and CEA Cadarache. The doctoral researcher will develop a generic, scalable, and dynamic algorithm for multiphysics coupling. The goal is to detect the interaction strength between physical models and automatically adapt calculation orders and coupling schemes while accelerating numerical resolution in a conservative manner. The project combines mathematical analysis of multiphysics coupling with spectral characterization of coupling strengths, dynamic algorithm design, advanced numerical acceleration techniques, and large-scale scalability studies. It offers an opportunity to investigate how coupled physical systems interact mathematically and to design computationally efficient methods for their simulation. The supervisory team comprises Christopher Nahed at CEA Saclay and Isabelle Ramière at CEA Cadarache. The research environment connects applied mathematics, computational physics, numerical modelling, scientific programming, and large-scale simulation for nuclear-related applications.