Mass fraction/Mole fraction

VikramR · October 12, 2012, 11:12

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

ghorrocks · October 13, 2012, 05:29

Use a CEL expression to do the conversion.

sunflower · October 22, 2012, 02:23

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.

ghorrocks · October 22, 2012, 05:52

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

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

October 12, 2012, 11:12	Mass fraction/Mole fraction	#1
VikramR New Member Vikram Reddy Join Date: Jun 2012 Posts: 13 Rep Power: 13	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

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October 13, 2012, 05:29		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Use a CEL expression to do the conversion.

October 22, 2012, 02:23		#3
sunflower New Member Join Date: Oct 2010 Posts: 25 Rep Power: 15	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.

October 22, 2012, 05:52		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	The equation is here: http://en.wikipedia.org/wiki/Mole_fraction The variables and functions are listed in the CFX reference guide.