Incorporating Pressure into an Electrostatic Study

Hi,

I'm trying to perform a partial discharge analysis in cable insulation using COMSOL.

I would like to incorporate pressure into a void in the insulation (e.g. 101 [kPa]).

How would I do this in an Electrostatic study?

I was also wondering if it would be possible to assign Paschen's curve for a void, so that depending on the voids diameter and assumed pressure in the parameters, the simulation would automatically perform the necessary calculations for the voids characteristics.

PS: I've looked at all the examples COMSOL has to offer, but none of them helped in achieving a solution. So if you know of a good COMSOL model example for partial discharges, please let me know.

Thank you, AB