Hi,

I'm trying to simulate a DMF (digital microfluidic) chip in COMSOL Multiphysics 5.5. I used a 2D model and selected two phase flow, level set and electrostatic modules to simulate a droplet on a grounded electrode motion when an energized electrode is right next to it. but after running the program the droplet didn't move toward the electrode and just spread on the dielectric surface which has a thin low permittivity layer instead of hydrophobic layer on it.

I don't know if I should add another physics such as moving mesh or apply an external force to the droplet by using variable setting.

I would be really glad if you could help me.

thanks