# RelPermeability¶

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

Specifies the relative permeability . The relative permeability is dimensionless. It defines the permeability as where 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.