Coupling：How to couple Laminar two-phase flow with electroosmotic

Hello,everyone.

I‘m trying to simulate a microfluidic chip using electroosmotic pump.Because I want to capture the result that water erupt off the chip into the air,so i introduce the physics— Laminar two-phase flow.

However,when I was coupling the EC mode(in order to emerge electroosmotic in the flow) with the Laminar two-phase flow mode,it came into errors such as "singularity","Maximum numberof Newton iterations "……

So,I beg you all to help me if any of you konw how to do this coupling or konw what's correct mode to use for the Laminar two-phase flow with electoosmotic pump.

Thanks adcanced.