[Diksha]

Could anyone please help me on the below? I am trying to simulate the condensation of water vapour in a vertical square minichannel on fluent.

I am using implicit VOF, steady state, standard k-e model, energy on and Lee model, gravity on and surface tension added.

My BCs are:
inlet: mass flow rate, turbulence intensity, hydraulic diameter, temperature

outlet: pressure outlet, turburlence intensity, hydraulic diameter and backflow temp 0.

at walls: stationary and temp imposed

and symmetric bcs on two sides.

The problem is: every time my simulation diverges (in temperature or VOF-1). I have checked my mesh and the skewness is 0 and orthogonal quality is 1. So i think the mesh is good. I have used under relaxation factors, still it diverges. Could you please help me? Maybe am missing something. I don't know...

Thanks a lot... quite desperate with this.. please help
Diksha