Surface Magnetic Current Density
The Surface Magnetic Current Density boundary condition
specifies a surface magnetic current density at both exterior and interior boundaries, respectively. The magnetic current density is specified as a three-dimensional vector, but because it needs to flow along the boundary surface, COMSOL Multiphysics projects it onto the boundary surface and neglects its normal component. This makes it easier to specify the magnetic current density and avoids unexpected results when a magnetic current density with a component normal to the surface is given.
The Surface Current Density subnode is available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu.
Surface Magnetic Current density
Enter values or expressions for the components of the Surface magnetic current density Jms0 (SI unit: V/m).
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog. For information about the Constraint Settings section, see Constraint Settings in the COMSOL Multiphysics Reference Manual.