The Magnetohydrodynamics interface (
) is used to model the interaction between moving conducting fluids and magnetic fields. This multiphysics interface adds the
Magnetic and Electric Fields and the
Laminar Flow interfaces. The interface can be used to model a variety of magnetohydrodynamics phenomena in astrophysics, geophysics, metallurgy, and electrolytes. To model equilibrium discharges, use the dedicated
Equilibrium Discharges interfaces in the Plasma Module.
When a predefined Magnetohydrodynamics interface is added from the
AC/DC>Electromagnetics and Fluids branch (
) of the
Model Wizard or
Add Physics windows,
Magnetic and Electric Fields and
Laminar Flow interfaces are added to the
Model Builder. In addition,
The Multiphysics Branch is added, which automatically includes the multiphysics coupling feature
Magnetohydrodynamics.
When physics interfaces are added using the predefined couplings, for example Magnetohydrodynamics, specific settings are included with the physics interfaces and the coupling features.
For example, if separate Electromagnetics and Fluids and
Laminar Flow interfaces are added, COMSOL Multiphysics adds an empty
Multiphysics node. When you right-click this node, you can choose
Magnetohydrodynamics from a list of available coupling features but the modified settings are not included.
The Magnetohydrodynamics multiphysics coupling node is described in the next section.
Physics nodes are available from the Physics ribbon toolbar (on Windows), the
Physics context menu (on macOS and Linux), or by right-clicking to access the context menu (all platforms).