[Yezi]

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.

[CeesH]

you need to also enable the species model, and tick the option 'volumetric reaction' there to be able to set up reaction equations.

[Yezi]

Originally Posted by CeesH

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.

[CeesH]

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

[Yezi]

Originally Posted by CeesH

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.

[CeesH]

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.

[Yezi]

Originally Posted by CeesH

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!!!

[qhwj1990]

Originally Posted by Yezi

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 !

[Yezi]

Originally Posted by qhwj1990

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.

[qhwj1990]

Originally Posted by Yezi

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.

[qhwj1990]

Originally Posted by Yezi

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 .

[hfalleiro]

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)

[sanmi]

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.

[Tapan Dave]

Originally Posted by Yezi

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'

[Tapan Dave]

Originally Posted by sanmi

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'

[Yunsung_Park]

I also met the same messeage, and figured out to avoid it.

Copy one of mixture phase, and define them as liquid phase.

In liquid phase, define two liquid species.
One is your species, the other is some random one

And I just simply set the concentration, inflow, everything as 0 for the random species.

Hope this trick will work to your problem