Discussion Forum

Hi all, My name is Tausif and new to Comsol. I am doing an analysis of the movement of water layer placed in an electric field. The two copper electrodes placed parallel and both are covered by Teflon and latex respectively. And between them, the water layer is kept. I have prepared a geometry and modelled electrostatic interface. I have modelled a surrounding air also. I don't have a deep electrical background. I have modelled the electrostatic physics and for charge conservation, for all materials except water, I have considered the relative permittivity to calculate the electric field. And for water, I have taken polarisation option to compute the electric field. And I kept the polarisation by default. Water I have taken as non-solid.
Is it correct?
What is zero charge node exactly define?
And what is floating potential defines?
I tried to solve after this for creeping flow physics, but the error comes when I use, electro-osmotic velocity. And use the built-in function for this.

Can anybody help me?