KU Leuven Plasma Astrophysics Seminars
Title: BxC, a swift generator for magnetohydrodynamic turbulence
Speaker: Jean-Baptiste Durrive
Abstract: An analytical model for 3D incompressible fluid turbulence was recently introduced in the hydrodynamics community which, with only a few parameters, shares many properties of experimental and numerical turbulence. The key point of this model is to apply a non-linear transformation (found from Navier-Stokes equations) to a given Gaussian white noise, resulting in a non-Gaussian random field. Taking inspiration from their construction and in view of modeling astrophysical environments, we suggest from simple geometric arguments another non-linear transformation which enables us to generate, with little computing resources, 3D divergence-free turbulent-looking vector fields, the curl of which have the characteristic sheet-like structures of current densities, i.e. fairly realistic magnetic field models.
