Magnetohydrodynamics

The plasma making up the Sun can be modeled as an MHD system
Simulation of the Orszag–Tang MHD vortex problem, a well-known model problem for testing the transition to supersonic 2D MHD turbulence

Magnetohydrodynamics (MHD; also called magnetofluid dynamics or hydro­magnetics) is a model of electrically conducting fluids that treats all types of charged particles together as a single continuous fluid. It is primarily concerned with the low-frequency, large-scale magnetic behavior of plasmas and liquid metals and has applications in multiple fields, including space physics, geophysics, astrophysics, and engineering.