Turbulent counter-flow

cristion

I have two incompressible fluids (water and ethanol) that flow in rectangular canals in a turbulent counter-flow. The fluids are separated by a steel plate (5 mm). I want to study the heat transfer between the two fluids through the plate. My model is made in GAMBIT 2D.The questions are:

1. How I must define the boundary condition for the two interfaces (fluid1-plate and plate-fluid2): interface, interior, internal or wall? 2. For fluid entrance is good if I defined velocity_inlet and for outlet: outflow? 3. For the symetry axe (the model is simetric by OX) should I define symetry or axis?

I think that my problem is not so complicated but I didn't find a good explanation for my problem in Gambit and Fluent Help! So, thank you for your help!