Combustion of methane (2D)

Update: January 24, 2018
OpenFOAM 4.x

Case directory

$FOAM_TUTORIALS/combustion/fireFoam/les/smallPoolFire2D

Summary

Methane flows in and burns from the region "inlet", which is a part of the floor of the air-filled two-dimensional area. The regions other than the floor are assumed to be open.

Model geometry Model geometry

The chemical species and combustion reactions with methane and air are defined in the file "reactions" in the directory "constant" as follows. The properties of each chemical species are defined in the file "thermo.compressibleGas" in the same directory.

species
(
    O2
    H2O
    CH4
    CO2
    N2
);
reactions
{
    propaneReaction
    {
        type         irreversibleinfiniteReaction;
        reaction     "CH4 + 2O2 + 7.5N2 = CO2 + 2H2O + 7.5N2";
    }
}

These two file "reactions", "thermo.compressibleGas", are imported in the file "thermophysicalProperties" in the directory "constant" to read the settings.

The meshes are as follows.

Mesh Meshes

The calculation result is as follows.

CO2 distribution (CO2)

Commands

cp -r $FOAM_TUTORIALS/combustion/fireFoam/les/oppositeBurningPanels oppositeBurningPanels
cd oppositeBurningPanels

blockMesh
topoSet
createPatch -overwrite

cp 0/ph_rgh.orig 0/ph_rgh

fireFoam

paraFoam

Calculation time

33 minutes 24 seconds *Single, Inter(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz