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Old   October 9, 2012, 11:31
Question Species in Mixture
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Alamo
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Hi All,

I define a gas mixture consisting of, let say, three species 'a','b', and 'c'. When I want t assign boundary conditions, under species-tab, by default, I am given options to set mass fration of only 'a' and 'b'. But I want to be able to assign the mass fraction for the other element ('c'). What am I missing?

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A
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Old   October 10, 2012, 03:10
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Max
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Keep in mind that all mass fractions must sum up to 1.
After some sophisticated mathematics the equation a+b+c=1 will give you the right answer.

cheers
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Old   January 18, 2013, 08:28
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idil tezcan
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the last specie in the mixture list you assign should be the bulk specie. you cannot specify the mass fraction of the last one it computes automatically.
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