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Flow of water droplet in dielectric medium due to electrostatic force

Posted Sep 1, 2017, 9:06 p.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Microfluidics Version 5.3 0 Replies

Tausif Mulla
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Hi, there. I am modeling a flow of water droplet in the dielectric medium due to the applied electric field in 2D. I have taken electrostatic, laminar flow and phase field physics and multi physics for modeling two phase flow of air and water. Water is my first fluid and air is the second. I have modeled physics according to Comsol tutorial "Separation Through Electrocoalescence". In my case what should be the phase field function? For water and air? I have taken -1 for water and 0 for air. I tried to solve this for step input of electrical voltage for 7 seconds. For 0.3 seconds, it is solving but when I put large time, it is producing this error-
"Repeated error test failures. May have reached a singularity.
Time : 0.003750230725364472
Last time step is not converged."
Can anybody please guide through this, how to eliminate this error.
And can anybody assure me that my model is correct? I am unable to attach the Comsol file here. If anybody wants I will share the file

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0 Replies Last Post Sep 1, 2017, 9:06 p.m. EDT
COMSOL Moderator

Hello Tausif Mulla

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