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Old   June 5, 2006, 04:45
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yolan
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Hi all!

I have a volume with air and hydrogen. How can I get the mass of H2 in that volume in a moment? I've got the mass fraction in a point but not the mass in the whole volume. Is there a way of getting it directly? Thank you!
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Old   June 5, 2006, 08:28
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Joe
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Search for "volint" in the manual.

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Old   June 5, 2006, 12:07
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yolan
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Yes, I've tried but I just get the total mass and I need just the mass of hydrogen. Could you help me?
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Old   June 5, 2006, 12:26
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Robin
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Take the volume integral of the density*mass fraction. (i.e. sum of density*mass fraction*volume of control volume).
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Old   June 5, 2006, 12:48
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yolan
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Thank you! I think that has worked!!!
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Old   June 5, 2006, 12:59
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Robin
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...as it should.
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