Boundary conditions in multiphase simulation
 

Hi everyone,
I have been working on a tank which is filled with 3 fluid mixture. My problem is at the inlet boundary condition. I am only allowed to set the inlet velocity of the mixture. My problem is that the mixture has an specific fraction for each phase. But I can only select "mixture" if I try choosing a single phase, all my other Boundary conditions change to just that phase. What can I do to specify custom fractions of each phase? or separate inlet boundary conditions without having the problem with all other boundary changing to that single phase?

AA