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How to simulate a case with two substances of which both can be condensed?

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Old   November 4, 2013, 04:28
Default How to simulate a case with two substances of which both can be condensed?
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Lee
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As the title said, I would like to simulate a case with two substances. But I should take the condensation into consideration. I've read the multiphase flow in the tutorials. But it consistent of only one material with HBM model. So for two materials, how should I do? In one word, how to simulate the condensation of mixtures?
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Old   November 4, 2013, 05:33
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This cannot be modelled simply and no model exists in CFX to do it to my knowledge. Condensation of a single species is complex enough, let alone two species. For instance, how does the nucleation of one species affect the other? Does it amplify or retard nulceation of the second species? The answer to that very basic question is going to have a complex answer.

I suspect you are going to have to make some major simplifications to make this simulation possible - maybe assuming one substance does not affect the other, or maybe that they can be treated as a single mixture (ie the condense together).

What are you modelling anyway?
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Old   November 4, 2013, 05:53
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I‘ve tried to regard the mixture as a pure substance so that they can be condensated together. But there is some difficulty in writing the material of liquid in CFX(user defined). For gas I can described it with rgp file but I don't how to deal with the liquid of the mixture.
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