Backstep flow

Update: June 1, 2017
OpenFOAM 4.x

Case directory

$FOAM_TUTORIALS/incompressible/pimpleFoam/pitzDaily

Summary

We calculate the backstep flow from 0 sec to 1 sec.

The fluid flows in from the region "inlet" at (10, 0, 0) m/s and out from the region "outlet". A no-slip condition is set for the channel walls, and the problem is solved in 2 dimensions with a single mesh in the Z direction. The standard k-ε model is used as the turbulence model.

Model geometry Model geometry

The meshes are as follows.

Mesh Meshes

To visualize the calculated turbulence energy and turbulence dissipation rate, check "k" and "epsilon" in the "Properties" tab on ParaView.

Check k and epsilon Check "k" and "epsilon"

The calculation result is as follows.

Flow velocity (U)
Flow velocity at 0.05 seconds (U) Flow velocity at 0.05 seconds (U)
Pressure at 0.05 seconds (p) Pressure at 0.05 seconds (p)
Turbulence energy at 0.05 seconds (k) Turbulence energy at 0.05 seconds (k)
Turbulence dissipation rate at 0.05 seconds (epsilon) Turbulence dissipation rate at 0.05 seconds (epsilon)

Commands

cp -r $FOAM_TUTORIALS/incompressible/pimpleFoam/pitzDaily pitzDaily
cd pitzDaily

blockMesh
pimpleFoam

paraFoam

Calculation time

5分13.77 seconds *Single, Inter(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz

Reference