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Soot modelling

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Old   July 21, 2021, 11:16
Default Soot modelling
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Hello,
I am new to the use of OpenFoam in Fire Modelling, and I am wondering what is the difference between the two soot models available (mixtureFractionSoot<gasEThermoPhysics> and mixtureFractionSoot<gasHThermoPhysics>) and also what do the coefficients mean (nuSoot and Wsoot).
I already looked on google and on openfoam.org / openfoam.com + on this forum and it seems like my question hasn't been asked before.
Thanks
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Old   July 22, 2021, 04:41
Smile By looking a bit deeper I found an answer to by second question
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http://www.tfd.chalmers.se/~hani/kur...sh_revised.pdf :

WSoot = molecular weight of soot
nuSoot= number of moles of soot

I still dont get the difference between the two soot models though, if anyone can help
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Old   July 22, 2021, 06:01
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Hi Margaux,

To my knowledge, there is only one soot model implemented in OpenFOAM: mixtureFraction. (https://github.com/OpenFOAM/OpenFOAM...tureFraction.H)

The difference between gasEThermoPhysics and gasHThermoPhysics is only related to the thermophysical properties. You can either choose a thermo package based on the enthalpy (H) or the internal energy (E).

The form of energy you are using is defined in thermoType in the thermophysicalProperties file.
Have a look here : https://cfd.direct/openfoam/user-gui...#x36-2690007.1

It doesn't make a difference in the soot model, it only changes the form of the energy being solved.

Cheers,
Yann
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Old   July 22, 2021, 08:40
Default very clear answer !
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Thank you for your answer, I get the difference now !

have a nice day
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