# Three phase modelling

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 July 25, 2016, 07:49 Three phase modelling #1 New Member   Richard Join Date: May 2016 Posts: 16 Rep Power: 9 Hello, I am trying to model a bubble column consisting of water as the liquid phase with a oil layer on top, and air injection through a nozzle at the bottom of the column . I started with a two phase (air-water) bubble column using the Eulerian method and this works well, but when I try to add a third phase for the oil layer it requires me to define a diameter and treats it like another gas phase. Is there another way in which I can include the oil phase in Fluent? Thanks, Richard

 February 3, 2017, 04:49 #2 New Member   Join Date: Jan 2015 Posts: 6 Rep Power: 10 Hello Richard, I have similar problem. I'm trying to simulate two continuous phases and one dispersed. No success so far. Did you figure it out? Kind regards, Marta

 February 3, 2017, 06:07 #3 New Member   Richard Join Date: May 2016 Posts: 16 Rep Power: 9 The Eulerian method only allows a maximum of one continous phase. All other phases need to have a diameter specified. So you can create 1 continous and 2 extra phases, but you would need to define an arbitrary diameter for one of your continous phases. Alternatively, you can convert the continous phase into a mixture phase by specifying two materials . However, there will be no interfacial forces between these two materials since they are part of the same phase

 February 3, 2017, 06:46 #4 New Member   Join Date: Jan 2015 Posts: 6 Rep Power: 10 Thank you for reply. I tried to "artificially" add dispersed phase to VOF model but i can't get no further than 1 sec of model time. I thought about UDF, but that will require learning of writing codes... Have you modeled with arbitrary diameter for one of phases?

 February 3, 2017, 07:43 #5 New Member   Richard Join Date: May 2016 Posts: 16 Rep Power: 9 Yes I can simulate an extra liquid phase with an arbitrary diameter

 May 22, 2017, 17:50 #6 New Member   Julio Herrera Venegas Join Date: May 2017 Posts: 1 Rep Power: 0 Hi guys, Actually, i am facing a similar problem. I need fill a confined space whit slurry (copper concentrate). My strategie is have two continuos phases (air + water) and one discrete phase (copper particle). However, i have divergence problems whit the simulation. Any idea how can i do this simulation? In specific, i cant set the volumetric fraction of discrete phase, even if i active the granular model for the discrete phase. Sorry for my bad english, is not my natural lenguage.

 Tags bubble column, eulerian, fluent, multiphase, secondary phase