Target volume/mass flow rate for multiphase

- April 21, 2022 at 2:07 pm
  
  BevisPrivett
  Subscriber
  
  Hi all.
  I am aware it is not possible to set a target outlet mass flowrate for the pressure-outlet option for multi-phase. I want to fix the volume (or at least mass) flowrate out of a bottom run off valve, at the moment with mass-outlet specified I have to input the mass flow of both phases, however, this is something I am not sure of. I just know the volume flowrate which the pump is pulling. See picture below.
- April 22, 2022 at 9:46 am
  
  Rob
  Forum Moderator
  
  Not an easy one at present as the boundary conditions aren't well suited to this. There are a couple of tricks/options with source terms and fix conditions, but the how is unfortunately beyond what I'm permitted to share via the open community.
- April 28, 2022 at 7:42 am
  
  BevisPrivett
  Subscriber
  
  Hi Rob I got help from ANSYS, they recommended changing the outlet to a velocity outlet give a negative velocity, you can then calculate the expected velocity and set that as a negative inlet velocity.
  
  Thanks Bevis
- April 28, 2022 at 8:50 am
  
  Rob
  Forum Moderator
  
  Thanks for sharing.

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