The Magnetic Shielding node adds a boundary condition for magnetic shielding. It describes a thin layer of a highly permeable medium that shields the magnetic field. The boundary condition uses the following equations for the normal magnetic flux density discontinuity and the tangential magnetic field inside the layer:

In these equations, ∇t represents a tangential derivative (gradient), and ds is the surface thickness.

Enter a value or expression for the Surface thickness ds (SI unit: m).

Select Relative permeability μr (dimensionless) to use the constitutive relation B = μ0μrH. The default uses values From material. For User defined enter another value or expression.

Select B-H curve |B| (SI unit: T) to use a curve that relates magnetic field H and the magnetic flux density B as |B| = f(|H|). The Magnetic flux density norm setting can take the values From material or User defined.