Speaker
Petri Käpylä
(University of Helsinki)
Description
We present preliminary results from high resolution
magneto-convection simulations where we find the formation
of flux concentrations from an initially uniform magnetic
field. We compute the effective magnetic pressure but find
that the concentrations appear also in places where it is
positive. The structures appear in roughly ten convective
turnover times and live close to a turbulent diffusion time.
The time scales are compatible with the negative effective
magnetic pressure instability (NEMPI), although structure
formation is not restricted to regions where the effective
magnetic pressure is negative.
Primary author
Petri Käpylä
(University of Helsinki)
