skin_depth#

emg3d.meshes.skin_depth(frequency, conductivity, mu_r=1.0)[source]#

Return skin depth as a function of frequency and conductivity.

The skin depth \(\delta\) (m) is given by

(34)#\[\delta = \sqrt{\frac{2}{\omega\sigma\mu}}\ ,\]

where \(\omega=2\pi f\) is angular frequency of frequency \(f\) (Hz), \(\sigma\) is conductivity (S/m), and \(\mu=\mu_\rm{r}\mu_0\) is magnetic permeability (H/m).

Parameters:
frequencyfloat

Frequency (Hz).

conductivityfloat

Conductivity (S/m).

mu_rfloat, default: 1.0

Relative magnetic permeability (-).

Returns:
skindepthfloat

Skin depth (m).