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how to define more than one species in one phase?

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Old   June 15, 2015, 04:59
Default how to define more than one species in one phase?
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Linwei
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For this chemical reaction: C(s) + O2(g) = CO2(g). I want to set O2 and CO2 as different species in gas phase. But only one kind of material can be chosen when setting primary phase under "Phases". How can I do? Thank you very much.
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Old   June 15, 2015, 05:31
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you need to also enable the species model, and tick the option 'volumetric reaction' there to be able to set up reaction equations.
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Old   June 15, 2015, 14:38
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Originally Posted by CeesH View Post
you need to also enable the species model, and tick the option 'volumetric reaction' there to be able to set up reaction equations.

Thank you! I have known how to define more than one species in one phase. But another question is how can I set the volume fraction for each species? Thank you very much.
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Old   June 16, 2015, 07:38
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Like you would do with single phase. Under boundary conditions, you have the tab 'multiphase' for inlets to set the volume fraction of phase 2.

In each separate phase, you have the species tab to set the mole or mass fraction of each species in that particular phase.

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Old   June 16, 2015, 08:19
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Quote:
Originally Posted by CeesH View Post
Like you would do with single phase. Under boundary conditions, you have the tab 'multiphase' for inlets to set the volume fraction of phase 2.

In each separate phase, you have the species tab to set the mole or mass fraction of each species in that particular phase.

Best,
Cees

Thank you very much. I Know I can set the volume fraction of Phase 2 under boundary conditions.

I wonder how to set the mole or mass fraction of each species in the gas phase after I defined the material under Species--Mixture Material.

Thank you.
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Old   June 16, 2015, 09:34
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As mentioned, you can also find 'species' under boundary conditions.
You can find this both when considering the conditions for phase 1 and for phase 2, where for each phase, you can set the adequate mass or mole fractions for the species.
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Old   June 17, 2015, 06:57
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Quote:
Originally Posted by CeesH View Post
As mentioned, you can also find 'species' under boundary conditions.
You can find this both when considering the conditions for phase 1 and for phase 2, where for each phase, you can set the adequate mass or mole fractions for the species.

Yes, I have found that! Thank you very much!!!
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Old   May 30, 2016, 06:16
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Quote:
Originally Posted by Yezi View Post
Thank you! I have known how to define more than one species in one phase. But another question is how can I set the volume fraction for each species? Thank you very much.
hello! I meet the same question.
I used the Eluer model , I defined the primary phase is water-liquid and the second phase is the mixture of water-vapor and air .
But I am failure. the soft donet that there must be more than one species on each phase!
could you tell me what should I do ? Thanks a lot !
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Old   May 31, 2016, 06:14
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Originally Posted by qhwj1990 View Post
hello! I meet the same question.
I used the Eluer model , I defined the primary phase is water-liquid and the second phase is the mixture of water-vapor and air .
But I am failure. the soft donet that there must be more than one species on each phase!
could you tell me what should I do ? Thanks a lot !
Enable model "Species" at the same time.
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Old   May 31, 2016, 10:14
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Quote:
Originally Posted by Yezi View Post
Enable model "Species" at the same time.
Thanks you very much!
Mybe I didn't describe my question. I mean I enable model "Species" and Eluer model at the same time. Defined the primary phase is water-liquid and the second phase is the mixture of water-vapor and air. When I clicked initialization, the soft reminder that there must be more than one species on each phase!
What reason is this? Thanks.
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Old   May 31, 2016, 20:45
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Quote:
Originally Posted by Yezi View Post
Thank you! I have known how to define more than one species in one phase. But another question is how can I set the volume fraction for each species? Thank you very much.
Could you tell me how to define more than one species in one phase? Thanks a lot .
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Old   January 15, 2018, 04:47
Smile error i am getting in Fluent " there must be more than 1 species on each phase"?
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I am using multi-phase Eulerian granular model. I have activated the species model. I am trying to find layering on a solid surface from the bulk solution. I am having 2 phases ( 1 liquid phase + 1 solid phase)
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Old   April 28, 2020, 11:12
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Hello. Pls were you able to find the solution to specifying more than one species for a phase?. I am also receiving the same message as I try to initialize my problem.
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Old   September 22, 2020, 05:12
Default simulating evaporation of water in presence of non condensable gas (air).
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Quote:
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Thank you! I have known how to define more than one species in one phase. But another question is how can I set the volume fraction for each species? Thank you very much.

Can you please tell how to define 'more than one species' in water_liquid! I am trying to simulate water vapour evaporation in presence of non condensable gas (air). I have switched on 'VOF_eularian model/VOF_mixture model', species transport equation, energy equation.

Phase1 is defined as 'water vapour+ air' and Phase2 is 'water(liquid)'.


In 'Phase iterations'>'mass' tab>'species mass transfer' mechanism is used/activated. With In species mass transfer model:-'two resistance model'>'zero resistance' is activated.


I am getting error : 'There must be more than one species on each phas'
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Old   September 22, 2020, 05:13
Default simulating evaporation of water in presence of non condensable gas (air).
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Quote:
Originally Posted by sanmi View Post
Hello. Pls were you able to find the solution to specifying more than one species for a phase?. I am also receiving the same message as I try to initialize my problem.

Did you find the solution of the error??


Can you please tell how to define 'more than one species' in water_liquid! I am trying to simulate water vapour evaporation in presence of non condensable gas (air). I have switched on 'VOF_eularian model/VOF_mixture model', species transport equation, energy equation.

Phase1 is defined as 'water vapour+ air' and Phase2 is 'water(liquid)'.


In 'Phase iterations'>'mass' tab>'species mass transfer' mechanism is used/activated. With In species mass transfer model:-'two resistance model'>'zero resistance' is activated.


I am getting error : 'There must be more than one species on each phas'
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