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-   -   how to calculate volume or mass ? (http://www.cfd-online.com/Forums/fluent/48652-how-calculate-volume-mass.html)

Yasmail AKARIOUH July 2, 2008 03:28

how to calculate volume or mass ?
 
hello

i have to calculate the volume or the mass of a specie in post-processing and i don't know the good report type to select in Volume Integrals.

can you indicate me the right way to calculate the volume of water in a region ( for example )?

thx

Volker Pawlik July 3, 2008 05:51

Re: how to calculate volume or mass ?
 
To calculate the mass in a region (I assume a volume?) use the concentration (fluent offers mol/volume) and calculate the volume average of your concentration. Then multiply the result with the volume and the mole weight or just take the volume-averaged density times the volume and the massfraction, where you should obtain the same.


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