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error in calculating mole fractions

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Old   February 16, 2010, 05:16
Default error in calculating mole fractions
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Emanuele Leoni
Join Date: Apr 2009
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Hi, I have a problem: I would like to change the radiation model in openfoam 1.5-dev using a species-weighted absorption coefficient (wggs) to compare my results with fluent and experimental data. The point is that in the equation of wggs I have the mole fraction and not the mass fraction. I tried in the simplest way, using the equation to change mass fraction in mole fraction trough the total molecular weight. I wrote a code like this:

volScalarField unosuMWtot
    dimensionedScalar("zero", dimensionSet(-1,0,0,0,1,0,0), 0.0)
for (label i=0;i<Y.size();i++)
where chemistry is a pointer to a chemistrymodel object, Y is the ptrlist of the compositions and unosuMWtot would be 1 over the total molecular weight. In this way i get a segmentation fault error and i don't know why. probably this is for the chemistry->specieThermo()[i].W() row, because deleting it the error disappears. Anyway i don't understand because i used the same row in another class with a pointer to chemistrymodel in the same way and everything works fine.

So, anyway can find me a way to solve the problem, or maybe there is a direct function of chemistry model or hcomustionthermo where i can find the mole fraction without calculate it?

Thank you
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