Fluids

Fluids

Zero evaporation in DPM multicomponent model

    • Masi
      Subscriber

      Hi,

      I modeled an unsteady multi-component (3 species) injection in the open air (to model spray in the open air)

      DPM : two-way / unsteady/ solid-cone / multi-component ( 2 of 3 components evaporated)/ injection duration 0.1 s / injection velocity 100 m/s / max. number tracking 1000 /

      Continuous phase: LES (WALES)

      time step: 0.0005,

      but evaporated particle=0, why does it happen?

      Please help me in this issue.

    • Rob
      Ansys Employee
      If it's multi component and one component doesn't evaporate there will always something left.
    • Masi
      Subscriber
      Thank you for your reply! You mean that in the solution console,evaporated=0 because one of the components is non-evaporation. So, the solution is correct? and the other components' evaporation are not reported in output?
    • Rob
      Ansys Employee
      The report is for when that parcel is evaporated: so if one component does not evaporate no droplets are ever going to reach that state. Double check you have some of the non-evaporating component in the particle mixture for the injection.
    • DrAmine
      Ansys Employee
      Always check DPM summary. Particles with non volatile approach will never fully evaporate.
    • Masi
      Subscriber
      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.
    • DrAmine
      Ansys Employee
      I would say if you have a particle having a non volatile component with final fate evaporated then there is a small problem with the report.
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