[a.Asadi]

Hi.

I want to run "smallPoolFire2D" tutorial in fireFoam directory but when I change the combustion model to FSD I am receiving this error:

--> FOAM FATAL IO ERROR:
keyword semiImplicit is undefined in dictionary "...constant/combustionProperties.FSDCoeffs"


and this is the combustionProperties file :

FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "constant";
object combustionProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

//combustionModel infinitelyFastChemistry<psiThermoCombustion,gasHTh ermoPhysics>;
combustionModel FSD<psiThermoCombustion,gasHThermoPhysics>;

active true;

infinitelyFastChemistryCoeffs
{
semiImplicit no;
C 5.0;
}

FSDCoeffs
{
Cv 0.1;
ftVarMin 1e-2;

reactionRateFlameArea relaxation;

fuel Methane;

relaxationCoeffs
{
C 2.0;
alpha 1.0;
Methane
{
omega0 0.5;
eta -0.013;
omegaMin 0.01;
sigmaExt 470;
}
Propane
{
omega0 0.4;
eta -0.00656;
omegaMin 0.01;
sigmaExt 450;
}
}
}


now can you explain me what is semiImplicit and how I must add it to the combustionPropertise ??

thanks
Asadi.

[a.Asadi]

and another question :

can we use FSD combustion model with RANS turbulence models or only LES can be used ?

thanks.

[Franzi]

Originally Posted by a.Asadi

and another question :

can we use FSD combustion model with RANS turbulence models or only LES can be used ?

thanks.

I am also a newbe but here is what I think
For your first question, you have to define semiImplicit in the FSDCoeffs as you are using FSD now. but for FSD you need omega to be solved while les is one equation model which solves for k. I don't think its possible to use FSD with LES.

[vojha]

Hey Amir,

At this moment FSD has been implemented for LES only

Cheers