Calculated physical quantities in AC conduction

Help contents

For AC conduction problems, the QuickField postprocessor calculates the following set of local and integral physical quantities.

Local quantities:

• Complex amplitude of electric potential U;
• Complex vector of electric field intensity E = –gradU

  Planar case: \[ E_x = -\frac{\partial U}{\partial x}, \quad E_y = -\frac{\partial U}{\partial y} \]

  Axisymmetric case: \[ E_z = -\frac{\partial U}{\partial z}, \quad E_r = -\frac{\partial U}{\partial r} \]

• Complex vector of active j_active=σE,
  reactive j_reactive = iωε·E
  and apparent j_apparent = j_active + j_reactive current density;
• Time average and peak active Q_active = j_active·E,
  reactive Q_reactive = j_reactive·E,
  and apparent Q_apparent = j_apparent·E power density;
• Electric permittivity ε (its largest component in anisotropic media);
• Electric conductivity σ (its largest component in anisotropic media).

Integral quantities:

See section Integral quantities in AC conduction.