Hello erverybody, I have a question regarding Torque converter analysis. I have taken one sector from each of 3 components (Impeller, reactor &turbine). I have applied Inlet & Pressure boundary conditions at each component ends. And coupled these boundaries by regions.And grouped into 1 & 2. I tried to solve with explicit Multiple frames. For some reason the coupling between inlet and pressure boundaries is not happened. I think some problem with coupling of boundaries and grouping the couples. It would be great, if someone could help me with this matter.

Have you read the manual? do you use group 0, there are restriction if you use group 0. Are the 3 component 3 different materials? it must be 3 materials; for this type of coupling starccm+ is more convnient anyway. You'd rather use starccm+

Thank you vanessa. Yes 3 domains are in 3 different materials. I am using Groups.