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-   -   Species Mass Fraction in reactingFOAM (http://www.cfd-online.com/Forums/openfoam/109887-species-mass-fraction-reactingfoam.html)

Marshak November 28, 2012 20:39

Species Mass Fraction in reactingFOAM
 
Hi!

I am simulating methane CH4 combustion using reactingFOAM solver. I want to define a variable which is a function of local mass fraction of CO2, H2O in each computational cell and the cell size.for example:

A=Y_CO2*Y_H2O* cell size

Can anyone help me on how can I write the above in openFOAM coding language to access these variables.

kalle November 29, 2012 02:31

Hi,

To access species, something like this should work:

const volScalarField& Y_CO2 = composition.Y("CO2");
const volScalarField& Y_H2O = composition.Y("H2O");

Then you should consider that mesh.V() is just a scalarField, so you cannot directly multiply it with the above.

You can let A be a scalarField too and try this:

scalarField A(mesh.V() * Y_CO2.internalField() * Y_H2O.internalField() );

I have not tried the above code, so get back here if you get compilation or runtime problems.

K


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