The Distributed Capacitance node adds a distributed capacitance boundary condition according to the following equations for exterior boundaries (left) and interior boundaries (right):

Use this boundary condition to model a thin sheet or film of a dielectric material. The sheet has the relative permittivity εr and the surface thickness ds, and it is connected to the reference potential Vref.

Enter the values or expressions for Relative permittivity εr (dimensionless), Surface thickness ds (SI unit: m), and Reference potential Vref. The default value for the surface thickness is 10−3 m (1 mm) and 0 V for the reference potential.