Fisica The terrestrial and solar dynamos: effects of anisotropic magnetic
diffusivity on rotating magnetoconvection Enrico Filippi 08-01-2018 - 16:00 Via della Vasca Navale 84 - AULA A
This talk briefly recall the basics of the Dynamo Theory of the Planetary and Solar Magnetic Fields. Then, some results indicate the importance of the anisotropic magnetic diffusivity of the Earth’s Outer Core due to its turbulent state. For instance, Filippi et al., (2015) stated that the relaxation times of the Geomagnetic field dipole component in the last few millennia are much faster than those typically obtained by a simple magnetic diffusion in the geodynamo. That indicated that if the turbulence increases the magnetic diffusivity then the assumption of even anisotropic magnetic diffusivity is possible. Therefore, a former model (SÌŒoltis and BrestenskyÌ, 2010) about anisotropy in Rotating Magnetoconvection is extended and the advancements will be described. |