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MHD flows
Magnetohydrodynamics
(MHD) is the single fluid macroscopic description of a plasma, as a
conducting flow. In its incompressible and resistive verstion it is
based on the equations of electrodynamics (Maxwell equations), the
equations of fluids (Navier-Stokes equations) and a constitutive
relation for the current density and electric field (Ohm's law).
Compressibility can be taken into account by considering the continuity
law (mass conservation), a constitutive relation (equation of state)
and an energy balance equation.
Many space physics sytems, in geophysics and astrophysics, can be
described by the MHD approximation. And due to the very broad range of
length and time scales involved, those systems are often (almost
unavoidably) in a regime of turbulence, with strong non-linear
couplings among scales. The following is a list of research topics, and
corresponding projects of this group, in this area: