Overview🔗
- Solver: simpleFoam
- Experimental case described by Driver and Seegmiller [14]
- CFD case based on https://turbmodels.larc.nasa.gov/backstep_val.html
- Reynolds number based on the step height of \(Re_h\) 36000
- Reattachment at 6.26+-0.1 x/h
- $FOAM_TUTORIALS/incompressible/simpleFoam/backwardFacingStep2D
Mesh🔗
- 2D structured mesh created using blockMesh
Boundary conditions🔗
- \(U\) 44.2 m/s
- \(h\) 1.27 cm
Common fields🔗
Velocity: U
| Patch | Condition | Value |
|---|---|---|
| Inlet | fixedValue | 44.2 m/s in x |
| Outlet | zeroGradient | |
| Walls | noSlip |
Pressure: p
| Patch | Condition | Value |
|---|---|---|
| Inlet | zeroGradient | |
| Outlet | fixedValue | 0 Pa (static) |
| Walls | zeroGradient |
Turbulence fields🔗
- turbulence model: kOmegaSST
Turbulence viscosity: nut
| Patch | Condition | Value |
|---|---|---|
| Inlet | calculated |
|
| Outlet | calculated |
|
| Walls | nutUSpaldingWallFunction |
kOmega SST
Turbulence kinetic energy: k
| Patch | Condition | Value |
|---|---|---|
| Inlet | fixedValue | based on 0.061% intensity |
| Outlet | zeroGradient | |
| Walls | kqRWallFunction |
Turbulence specific dissipation rate: omega
| Patch | Condition | Value |
|---|---|---|
| Inlet | fixedValue | based on nut/nu = 0.009 |
| Outlet | zeroGradient | |
| Walls | omegaWallFunction |
Results🔗
Predictions are compared against the measurements by Driver and Seegmiller [14] below
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