Surfa
ce Current Density
The
Surface Current Density
boundary condition
specifies a surface current density at both exterior and interior boundaries. The 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 current density and avoids unexpected results when a current density with a component normal to the surface is given.
Surface Current Density
Enter values or expressions for the components of the
Surface current density
J
s0
(SI unit: A/m). The defaults are 0 A/m for all vector components.
