How to define two different phases with different species

mhatami · February 9, 2021, 18:07

Hello all,

I am trying to model CO2 being dissolved in a bubble column filled with water. For mass transfer definitions, I need to define two phases: for instance, liquid and gas, where the liquid phase includes h2o (l) and some other species, and the gaseous phase includes CO2 and air. Fluent only allows me to define material type as "solid", "fluid' or "mixture". I define one "mixture template" in which I add CO2, Air, and H2O (l), but I cannot add another "mixture template" in which I could define similar or different species. I define a dummy phase for CO2, but inside this dummy phase I cannot define a species under "Multiphase model -> Phase Interaction -> Mass -> Mass transfer -> "from phase" and 'species" to 'dummy phase" and "species".

Can anyone please help me with that? I want to do this to instruct Fluent to have mass transfer from CO2 in one phase to CO2 in another phase (dissolving)?

Thank you!

air · February 26, 2021, 05:31

hello, I have the same problem with you. Have you solved it? Can I ask you for some instructions?

mhatami · February 28, 2021, 11:51

Hi air,
Yes.
For creating a new mixture, when fluent ask if you want to overwrite say no. In this way, you can create a new mixture.

February 9, 2021, 18:07	How to define two different phases with different species	#1
mhatami New Member OH Join Date: May 2020 Posts: 3 Rep Power: 6	Hello all, I am trying to model CO2 being dissolved in a bubble column filled with water. For mass transfer definitions, I need to define two phases: for instance, liquid and gas, where the liquid phase includes h2o (l) and some other species, and the gaseous phase includes CO2 and air. Fluent only allows me to define material type as "solid", "fluid' or "mixture". I define one "mixture template" in which I add CO2, Air, and H2O (l), but I cannot add another "mixture template" in which I could define similar or different species. I define a dummy phase for CO2, but inside this dummy phase I cannot define a species under "Multiphase model -> Phase Interaction -> Mass -> Mass transfer -> "from phase" and 'species" to 'dummy phase" and "species". Can anyone please help me with that? I want to do this to instruct Fluent to have mass transfer from CO2 in one phase to CO2 in another phase (dissolving)? Thank you!

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February 26, 2021, 05:31		#2
air New Member Hang Join Date: Jan 2021 Posts: 2 Rep Power: 0	hello, I have the same problem with you. Have you solved it? Can I ask you for some instructions?

February 28, 2021, 11:51		#3
mhatami New Member OH Join Date: May 2020 Posts: 3 Rep Power: 6	Hi air, Yes. For creating a new mixture, when fluent ask if you want to overwrite say no. In this way, you can create a new mixture.