When the Particle release specification is set to Specify current, the Current Density subnode is available from the context menu (right-click the Wall parent node) or from the Physics toolbar, Attributes menu. The Current Density subnode uses accumulated variables on each boundary element in the selection of the parent node to calculate the current density due to the impact of charged particles.

Select a Type: Current density or Normal current density. For Current density accumulated variables are defined for the components of the current density vector. For Normal current density one accumulated variable is defined for the normal current density in each boundary element.