Hi DrAmine, My components are Alcohol, Hydrofluorocarbon-134a and the other one is a specific material, thatAlcohol and Hydrofluorocarbon-134a are 100% volatile materials and the third one is non-volatile. when I change the geometry of nozzle the evaporation happens (in the report). but with a specific shape, it is " evaporated=0" (in the report).But After completion of the calculation, when comparing the result of both of them seem that they are the same.