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Three phase modelling

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Old   July 25, 2016, 07:49
Default Three phase modelling
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Richard
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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
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Old   February 3, 2017, 04:49
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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
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Old   February 3, 2017, 06:07
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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
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Old   February 3, 2017, 06:46
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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?
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Old   February 3, 2017, 07:43
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Yes I can simulate an extra liquid phase with an arbitrary diameter
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Old   May 22, 2017, 17:50
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Julio Herrera Venegas
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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.
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bubble column, eulerian, fluent, multiphase, secondary phase

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