Mass fraction/Mole fraction
 

Hi, I have a geometry which has reaction in it. My problem is that I want the reaction term to be in terms of mole fraction and not mass fraction. How do I input the "source term" in terms of mole fraction??
Please help.

thanks in advance,
Vikram

Use a CEL expression to do the conversion.

Hi Glenn,

I am also trying to figure out how to convert mass fraction to mole fraction.

Can you please show us the CEL expression to do the conversion? Thanks a lot.

The equation is here:
http://en.wikipedia.org/wiki/Mole_fraction

The variables and functions are listed in the CFX reference guide.