[Help] AC electroosmosis, defining the electrode-electrolyte boundary condition

Dear all,

I am working on a 2D AC electroosmosis problem, the model consists of a pair of electrodes.
The models which I adopt are (1) Conductive DC media, and (2) Incompressible Navier-Stoke.
I have some difficulties in defining the boundary conditions at the electrodes.

Electrode BC (for Conductive DC media):
cond n dphi/dy=iwC_DL (phi-V_applied)
Electrode BC (for Incompressible Navier-Stoke):
u_slip=-eA/4n d|phi-V_applied|^2/dx
(refer to document for equations)

I would like to write the above two equations in COMSOL.
Any advice would be deeply appreciated.

Best Regards,
yang

Reference:
Loucaides N., Ramos A., Georghoiu G.E., Novel systems for configurable AC electroosmotic pumping, Microfluidics and Nanofluidics, Vol3, pp709-714, 2007. www.springerlink.com/content/171127n275151g66/