Yannick Ponty is CNRS Research Director since 2014 at Laboratoire J-L Lagrange, Observatoire de la Côte d’Azur, France. He obtained his Ph.D. degree in 1997 from the same affiliation. From 1997 to 2000 he has been a PostDoc at the University of Exeter, UK, and between 2000 and 2014 he held the position of Chargé de recherche 1ère classe CNRS first at the Laboratory Cassini, then at the Laboratory Cassiopée, and finally at the Laboratory Lagrange. Dr. Ponty's research primarily focuses on the numerical simulation and modeling of electrically conductive and turbulent flows. He has been developing high-resolution parallel numerical simulations to better study regimes with high magnetic Reynolds numbers. His research endeavors involve comprehensive comparisons between simulation results and experimental data, facilitating a deeper understanding of magnetohydrodynamics and the dynamo effect.
Easy path to Subcritical Dynamo Branches
We demonstrate that the nonlinear optimization of a finite-amplitude disturbance over a freely evolving and possibly even turbulent flow, can successfully identify subcritical dynamo branches as well as the structure and amplitude of their critical perturbations. As this approach does not require prior knowledge of the magnetic field amplification mechanisms, it opens a new avenue for systematically probing subcritical dynamo flows.
01 June 2023, 16h3017h30
Webinar: please contact F. Romano or J.P. Laval for the link
