Species in Mixture
 

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?

Thanks,
A

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

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.