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UDF Multiphase chemical reaction.

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Old   April 4, 2021, 18:15
Default UDF Multiphase chemical reaction.
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U1990
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Hello, everyone.


I am trying to model a chemical reaction between two different fluids using Eulerian multiphase model. However, the reaction rate is calculated according to many correlations. I have writting a UDF code to incorporate this equations in model. But my problem is when I try to program the reaction between the specie 1 (in phase 1) with specie 2 (in phase 2).


How can I identify and select a specific specie in a phase?


I appreciate very much your help.
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Old   April 5, 2021, 10:12
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Yasser Selima
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show what you have, so someone can suggest how to proceed
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Old   April 9, 2021, 03:04
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Jeroen
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I am not sure this is what you need, but you can get the index of a species in a mixture with the following bit of code (example is for oxygen):

Material *mat = THREAD_MATERIAL(t0);
int ind_O2 = mixture_specie_index(mat, "o2");

You can use this index to obtain the molecular weight or species mass fraction for example.
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