Learning Forum

[anamena]

 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 

[DrAmine]

You can think about using the Interfacial Area Concentration Model or one of Population Balance Approaches to model a dynamic PSD

[anamena]

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? 

 

[DrAmine]

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

[anamena]

Thank you for your help