The Floating Electrode node is a boundary subfeature for modeling what happens when a dielectric is in contact with a floating metal surface. A floating metal has equal potential and charges are confined to its surface. Note that the floating electrode domain needs to be excluded from the computation domains.

When the Material model of its parent feature is Insulator, the total charge Q0 can be assigned. The boundary conditions are:

When the Material model of its parent feature is Conductor, the current I0 flowing into the floating electrode can be defined. The boundary conditions are:

When the Material model of its parent feature is Charge transport, the charge at the floating electrode surface is computed automatically from the discharge current. In this case, an initial surface charge can be defined. The boundary conditions are:

where Jc is the conducting current density.

This section is available only when the Material model of its parent feature is Charge transport. It is used to specify boundary conditions for charge carriers at the electrode surface. See for more details.