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Multicomponent Condensation

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Old   November 2, 2018, 09:29
Default Multicomponent Condensation
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Dear Foamers,

I am going to solve the multi-component condensation. I already wrote the code for multi-component mass transfer in the presence of K-value at the boundary. I am wondering if condensation is the same thing here which can model with differing K-value at different temperature and pressure.
Besides that, I am wondering how someone would model the condensation of steam in the presence of other condensable gases.
My main problem is that I cannot formulate the problem in terms of boundary conditions and source terms. Any brainstorming is appreciated .
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Old   August 21, 2019, 05:53
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Thomas Flint
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Hi,


How are you getting on with your problem?



I am solving a similar problem. In my case I use a volumetric dilation source term.
This introduces an error though as you may have the case where in a cell one of the components is condensing and the other isnt, leading to a volume change in the non-condensing phase. I apply a correction step to account for this, but it's messy.
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Old   August 21, 2019, 11:02
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Hi Thomas,

Thanks for your message. I am still working on that. Have you found any solution?

Thanks,
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Old   August 21, 2019, 11:51
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Yes,

You need to modify MULES and then add a dilation term. I’m currently finalising a manuscript on this. You should also check out the papers of Alex Rattner at Penn state on condensing and evaporating flows.
Once you have modified mules for the state transitions you have to adjust the fluxes to maintain the volume consistency of the non boiling/condensing components ( I have t found a neat way to do this yet, so it’s very clunky for me at the moment)

I’ll share my manuscript draft when I have it in a better state.
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Old   August 27, 2019, 20:37
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Thanks Thomas. Let's say you have two components in your gaseous phase which are going to condense at different temperatures. So I am wondering how you are going to change their concentration in the gaseous phase.
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