bubble size distribution in a reactor

- November 5, 2018 at 7:45 pm
  
  anamena
  Subscriber
  
  Hello,
  
  Hello, I’m running a simulation of a 2L reactor. The domain is set up as multiphase (Eurelian), WATER and AIR. WATER is phase one and AIR is phase two and a 2k-epsilon ( disperse) model
  
  My geometry has a 7 holes sparger at the bottom with a 1 mm diameter and a disperse velocity of 0.606 m/s.
  
  The boundary conditions:
  
  Top_tank is degassing, impeller and tank are walls, inlet (7 holes) are inlet with volume fraction 1.
  
  I try to implement different bubble size with this set-up but is not working. I would like to now if there is another model that I have to include
  
  I hope someone can guide me, I thank in advance anyone that will be so kind to provide some information
- November 5, 2018 at 8:07 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  You can think about using the Interfacial Area Concentration Model or one of Population Balance Approaches to model a dynamic PSD
- November 7, 2018 at 8:06 pm
  
  anamena
  Subscriber
  
  Thank you for the suggestion. Do you know if there are specific UDFs for the Population Balance model in order to setup different bubble diameter?
- November 7, 2018 at 9:11 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  The idea of population balance methods is that you do not require to set the diameter but to prescribe classes or moments to calculate a dynamic psd/diameter
- November 13, 2018 at 12:15 am
  
  anamena
  Subscriber
  
  Thank you for your help