EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Global 3D simulation of the interaction between a turbulent solar wind and a magnetic dipole

Etienne Behar1,2, Pierre Henri2,3, Giulio Ballerini4,5, Francesco Pucci6, and Cyril Simon-Wedlund7
Etienne Behar et al.
  • 1Swedish Institute of Space Physics, Kiruna, Sweden (
  • 2Laboratoire Lagrange, Observatoire Côte d’Azur, Université Côte d’Azur, CNRS, Nice, France
  • 3LPC2E, CNRS, Univ. Orléans, CNES, Orléans, France
  • 4LPP, CNRS/Sorbonne Université/Université Paris-Saclay/Observatoire de Paris/Ecole Polytechnique Institut Polytechnique de Paris, Palaiseau, France
  • 5Dipartimento di Fisica, University of Pisa, Italy
  • 6Institute for Plasma Science and Technology, ISTP-CNR, Bari, Italy
  • 7Space Research Institute, Austrian Academy of Sciences, Graz, Austria

Far from an ideal laminar flow, the solar wind impacting planetary magnetospheres contains a spectrum of fluctuations extending to virtually all scales. The study of the effects of such fluctuations on a magnetosphere was until recently lacking a numerical tool which would provide a self-consistent global picture of such an interaction. Using a novel 2-step approach, the open source, hybrid-PIC code Menura is employed to first develop a 3D turbulent cascade in an otherwise homogeneous plasma, to then inject this turbulent solution in a domain containing a permanent dipole. We show how solar wind turbulence is affected by the crossing of the shock, and conversely how the global shape of the magnetosphere is evolving compared to its laminar counterpart. We additionally highlight how transient phenomena and coherent structures are naturally occurring in the foreshock and the sheath due to the local direction of the turbulent magnetic field.

How to cite: Behar, E., Henri, P., Ballerini, G., Pucci, F., and Simon-Wedlund, C.: Global 3D simulation of the interaction between a turbulent solar wind and a magnetic dipole, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-12129,, 2023.