bubble column
 

Hi, I am trying to model the 2-D flow dyanmics of bubble column (gas-liquid flow) using FLUENT, however, I do not get right profile result of the Gas Hold-Up. i work on superficial velocity about 0.02 m/s and eulerian model. But i dont know witch velocity i must put at velocity inlet boundary condition:virtual(inlet) or superficial. when i set velocity at 0.02 the inlet air those not move up and it remain in the bottom of column. i can send enyone my results . thenks for your helps.

mary