Professor Thierry Magin, laureate of a Jean d'Alembert Chair from the University of Paris-Saclay

Thierry MaginThe LPP (Laboratoire de Physique des Plasmas) is hosting Thierry Magin, professor at the von Karman Institute for Fluid Dynamics (Brussels, Belgium), laureate of a Jean d’Alembert Chair from the University of Paris-Saclay.

During two research stays of 3-month duration planned in 2018 and 2019, Dr. Magin will work on the development of advanced multi-component FLUid models for Plasma flows based on Kinetic theory and applied to Electric propulsion (FLUPKE project).

Two major technological challenges in electric propulsion are the presence of 3D instabilities appearing in a thruster engine, as well as the contamination of a satellite owing to the plume exiting a thruster. The multidisciplinary nature of these challenges makes it an ideal problem to be solved in collaboration with engineers, physicists and applied mathematicians from several complementary research teams of the LPP, CMAP, and LMO laboratories. The objective is to derive, based on kinetic theory, accurate fluid models for electric propulsion thrusters. Such complex multi-physics systems require a rigorous multi-scale and multi-parameter asymptotic solution method to fix many ad-hoc terms present in the heuristic fluid models currently used by the industry. In turn, the innovative models developed will be integrated into numerical tools to achieve predictive simulations. They will represent an alternative solution computationally cheaper than more conventional particle-based tools; this property is expected to allow us address the instability and contamination technological challenges. The ANR Industrial Chair POSEIDON will ease the transfer to industry of the results obtained in the FLUPKE project.

The transport of mass, momentum and energy in plasmas depends on averaged cross-sections calculated from intermolecular potentials that describe the collision between two particles, or from direct cross-section measurements. The correct description of the interaction is unlike an intuitive interpretation in Flupke’s game where marbles hit each other with an infinite repulsion (hard sphere potential model).

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