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-   -   fireFoam combustion properties (http://www.cfd-online.com/Forums/openfoam-solving/122879-firefoam-combustion-properties.html)

tobyB August 30, 2013 05:21

fireFoam combustion properties
 
Hello,

Could anyone help me find out where combustion properties are located in fireFoam? I am using oppositeburningpanels and can see that C3H8 has been used, and I do not seem to be able to find how they calculate or specify the heat released by combustion.
I also found a properties section for C3H8 in doxygen, it specifies rho, cp, and other things but not heat released.

Thanks

tobyB September 3, 2013 04:46

Cp combustion seems to be specified with cp polynomial coefficients in thermo.compressiblegas, then using enthalpy of different products before and after the reaction to get heat released.

Ok, so I have now found that varliable dQ specifies the heat released (in J), however I need to try and sum this value over each cell in the volume to get the total heat release rate.
Does anyone know how to do this in paraview? I have tried integrate variables, but that seems to only give me values for a single cell.
Exporting the grid to excel and summing all dQ values works, but it is quite a slow process.

Thanks,

Toby


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