Problem with gas-liquid separator
 

Hello, I'm trying to simulate gas-liquid separation using Eulerian model. When I'm running the simulation I'm getting error message. My physics are - Eulerian Multiphase, Multiphase Segregated Flow, Turbulent and Gravity. So I got mixture of gasses (CH4 and H2O) and my plan was condense water gas to liquid, so the water will be driven by gravity and will go down the pipe, but CH4 will go up. I specified 2 Eulerian phases which is H2O+CH4 (gas) and H2O (liquid). So why I am getting this message? As far as I understand it might be problem with my initial conditions and/or material properties. If you need more information let me know, I'm using Star CCM version 10.04.009.

Thanks in advance for any help you are able to provide.