Accumulation of solid particles in gas to a bending pipe

Update: August 10, 2017
OpenFOAM 4.x

Case directory

$FOAM_TUTORIALS/multiphase/reactingTwoPhaseEulerFoam/RAS/LBend

Summary

Model geometry Model geometry

We calculate the accumulation of solids in a curved pipe by blowing gas containing 30% solids (e.g., soot) into the pipe for 2 seconds. The calculation is performed as a two-dimensional problem with one mesh in the Z direction.

The gas mixed with solids flows in the region "inlet" at (0, -0.2, 0) m/s, and out from the region "outlet".

The properties of each phase are specified in the files "constant/phaseProperties", "*.gas" and "*.solids".

The meshes are as follows, and the number of mesh is 3840.

Mesh Meshes

The calculation result is as follows.

Solid phase (alpha.solid)
Gas phase at final time (alpha.gas) Gas phase at final time (alpha.gas)
Solid phase at final time (alpha.solid) Solid phase at final time (alpha.solid)
Pressure at final time (p.rgh) Pressure at final time (p.rgh)

We can see how the inflowing solids accumulate at the bends and obstruct the gas flow.

Commands

cp -r $FOAM_TUTORIALS/multiphase/reactingTwoPhaseEulerFoam/RAS/LBend LBend
cd LBend

blockMesh

reactingTwoPhaseEulerFoam

paraFoam

Calculation time

43 minutes 26.56 seconds *Single, Inter(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz