Fuel injection from a nozzle

Update: July 1, 2017
OpenFOAM 4.x

Case directory

$FOAM_TUTORIALS/multiphase/interFoam/les/nozzleFlow2D

Summary

Model geometry Model geometry

We analyze the fuel injection for 4 × 10-5 minutes. The fuel flows in from the region "inlet" at (460, 0, 0) m/s and out from the region "atmosphere". The analysis domain is wedge-shaped, and the calculation is performed as a two-dimensional problem with one mesh in the circumferential direction.

The fluid properties of the air and fuel are specified in the file "constant/transportProperties" as follows.

phases (fuel air);

fuel
{
    transportModel  Newtonian;
    nu              [0 2 -1 0 0 0 0] 5.952e-06;
    rho             [1 -3 0 0 0 0 0] 840;
}

air
{
    transportModel  Newtonian;
    nu              [0 2 -1 0 0 0 0] 8.5e-07;
    rho             [1 -3 0 0 0 0 0] 20;
}

sigma           [1 0 -2 0 0 0 0] 0.0261;

The meshes are as follows, and the number of mesh is 22403.

Mesh Meshes

The calculation result is as follows.

Volume ratio of fuel (alpha.fuel)
Volume ratio of fuel at 1.6×10^-5 sec (alpha.fuel) Volume ratio of fuel at 1.6 × 10-5 sec (alpha.fuel)

We can see the splash of the injection.

Commands

cp -r $FOAM_TUTORIALS/multiphase/interFoam/les/nozzleFlow2D nozzleFlow2D
cd nozzleFlow2D

blockMesh
topoSet -dict system/topoSetDict.1
refineMesh -dict system/refineMeshDict -overwrite
topoSet -dict system/topoSetDict.2
refineMesh -dict system/refineMeshDict -overwrite

interFoam

paraFoam

Calculation time

30 minutes 21.2 seconds *Single, Inter(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz