I want to specify CA = 0.1 mol/m^3 and CB = 0.2 mol/m^3 instead of specifying xA = 1/3 and xB = 2/3. Because xA = 1/3 and xB = 2/3, which can give many combinations of CA and CB.

Is there any formula to calculate concentration from mole/mass fractions in ANSYS Fluent? (note: take the velocities of both streams are equal)

Thanks for the help