Dam-break problem (RANS)

Update: July 1, 2017
OpenFOAM 4.x

Case directory

$FOAM_TUTORIALS/multiphase/interFoam/ras/damBreak

Summary

境界領域(下側) Model geometry

The dam-break problem (collapse of the water column) is calculated for 1 second using a turbulence model. The ceiling of the analysis domain (region "atmosphere") is assumed to be open, and the left wall, right wall and floor are assumed to be under no-slip conditions. The calculation is performed as a two-dimensional problem with a single mesh in the Z direction.

The direction of gravity acceleration is defined in the file "constant/g" as follows.

dimensions      [0 1 -2 0 0 0 0];
value           (0 -9.81 0);

We specify the standard k-ε model as the turbulence model in the file "constant/turbulenceProperties" as follows.

simulationType  RAS;
RAS
{
    RASModel        kEpsilon;
    turbulence      on;
    printCoeffs     on;
}

The meshes are as follows, and the number of mesh is 2268.

Mesh Meshes
Meshes (front view) Meshes (front view)

The calculation result is as follows.

Volume ratio of water (alpha.water)
Volume ratio of water at initial time (alpha.water) Volume ratio of water at initial time (alpha.water)
Volume ratio of water at final time (alpha.water) Volume ratio of water at final time (alpha.water)

Commands

cp -r $FOAM_TUTORIALS/multiphase/interFoam/ras/damBreak damBreak
cd damBreak/damBreak

blockMesh
setFields
interFoam

paraFoam

Calculation time

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