[aban]

i want to simulate the flow and reactive flow in a catalytic convertor. i prefer porousSimpleFoam for flow analysis and reactingFoam for reactive flow analysis. but can anyone give the governing equation for porousSimpleFoam and reactingFoam.

[RyanJohnson]

I can't speak for the porous solver, but the reactingFoam uses conservation equation based off of Niklas Nordin's phd thesis:
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CE0Q FjAA&url=http%3A%2F%2Ffiles.nequam.se%2Fthesis.pdf &ei=EKjkT5THEaf96gHXiYjQCg&usg=AFQjCNG3dme7wXXNenp 1Rao6PsWPksGeUg&sig2=ziT-meR8uQWUr5r9wst81w

If you take a quick look at the code (this is OF 1.7):

#include "chemistry.H"
#include "rhoEqn.H"

for (label ocorr=1; ocorr <= nOuterCorr; ocorr++)
{
#include "UEqn.H"
#include "YEqn.H"
#include "hsEqn.H"

// --- PISO loop
for (int corr=1; corr<=nCorr; corr++)
{
#include "pEqn.H"
}
}

You can see it solves for chemistry, density (based on continuity), velocity, species, sensible enthalpy then uses the PISO (some solvers use SIMPLE) algorithm to solve for pressure in a segregated manner.

If you go into OpenFOAM-1.7.0/applications/solvers/combustion/reactingFoam you can read the header files for these equations and see the specific terms that are included in the solved equations. I know that the code uses a schmidt's number of unity approximation....I moved away from reactingFoam and wrote my own that has detailed diffusion terms.

hope this helps!
-Ryan

[matthi]

Hello Everybody,

you can find also an OpenFOAM solver which makes use of the software toolbox DETCHEM. The properties, gasphase reactions and surface reactions are taken from a shared library. You can calculate any geoemtry with a catalytic surface or you can calculate monoliths, weher flow and detailed chemistry inside the single channels are calculated outside of OpenFOAM. For academic use this code is free, for industrial use you have to buy a part of the DETCHEM software. You find information at www.detchem.com. Click on Software on the left side and have a look to in the product list.

Greetings matthi