Update: June 1, 2017

$FOAM_TUTORIALS/incompressible/pisoFoam/ras/cavityCoupledU

We calculate the flow of a system where the upper wall "movingWall" is moving in parallel at 1 m/s and the other walls "fixedWalls" are stationary from 0 sec to 10 sec. There is no inflow or outflow of fluid, and the calculation is performed as a two-dimensional problem with a single mesh in the Z-direction.

Model geometry

The standard k-ε model is used for the turbulence model.

For the flow velocity (U) solver, we will use the conjugate type solver PBiCCCG. This setting is specified in the file system/fvSolution as follows.

U { type coupled; solver PBiCCCG; preconditioner DILU; tolerance (1e-05 1e-05 1e-05); relTol (0 0 0); }

The meshes are as follows.

Meshes

The calculation result is as follows.

Flow velocity (U)

Flow velocity at final time (U)

Pressure at final time (p)

We can see that a vortex is being generated.

cp -r $FOAM_TUTORIALS/incompressible/pisoFoam/ras/cavityCoupledU cavityCoupledU

cd cavityCoupledU

blockMesh

pisoFoam

paraFoam

cd cavityCoupledU

blockMesh

pisoFoam

paraFoam

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