[chemeng]

Hello! I want to simulate a two phase mixing tank (air-water). I want to set the water level at a high of 0.26 meters in the y direction in the tank before the operation starts.
My overall domain is: (-0.129986 0 -0.129999) (0.13 0.35 0.129999)
I want to simulate two cases:
1. Without airation, using MRFSimpleFoam.
2. With airation, using MRFTwoPhaseEulerFoam.
For the first case I don't know how to set the liquid level.
For the second case I have tried setFields, but I don't know if it is correct. My setFieldsDict is:

regions
(
boxToCell
{
box (-0.129986 0 -0.12.9999) (0.13 0.26 0.12999);
fieldValues
(
volScalarFieldValue alpha 0
);
}
);
Could anybody help me to set the liquid level in the first case and say to me if in the second case the configuration is ok?
Thanks in advance.