RelPermeability¶

Type:	2-Tensor, or section
Range:	[v_1, …, v_9]
Default:	[1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0]
Appearance:	simple

Specifies the relative permeability $\TField{\mu}^{(\mathrm{rel})}$ . The relative permeability is dimensionless. It defines the permeability as $\mu=\mu_0 \TField{\mu}^{(\mathrm{rel})},$ where $\mu_0=4 \pi \cdot 10^{-7} \units{H/m}$ is the magnetic constant in units henrys per meter.

A constant relative permeability can be defined by assigning a rank-2 tensor:

Material {
  # defines a constant relative permeability
  RelPermeability =
      [..., ..., ...
       ..., ..., ...
       ..., ..., ...]
}

Assign a scalar for an isotropic relative permeability:

Material {
  ...
  RelPermeability = 1
}

For more general cases, the relative permeability may be given as a section in order to deal with space, time, frequency and parameter dependent definitions:

# define the relative permeability as a section
RelPermeability {
  Python {...}
  ...
}

Field definitions within the section RelPermeability are summed up. Consult the subsequent sections to see which types of field definitions are allowed.