Ahmed Bluff Body CFD Validation
The purpose of this repo is to serve as a starting point for further automotive/motorsport CFD or as a resource for CFD code validation. The Ahmed bluff body geometry is included so anyone can use it in their simulations. If you would like to add a validation case, please open a pull request and I'll add it! Thanks!
Current results
| case_id | case directory | decklid angle | solver | turbulence model | cd | cd error | cl | cl error |
|---|---|---|---|---|---|---|---|---|
| 1-A | openfoam_rans | 25 | simpleFoam | RAS - kOmegaSST | 0.299 | 0.000 | 0.339 | -0.006 |
| 1-B | openfoam_rans | 35 | simpleFoam | RAS - kOmegaSST | ||||
| 2-A | openfoam_les | 25 | pisoFoam | LES - SpalartAllmarasDDES | ||||
| 2-B | openfoam_les | 35 | pisoFoam | LES - SpalartAllmarasDDES |
- c_d and c_l values are calculated by averaging the last 50 time steps for rans case
| Mesh properties by case | case_id | cell count | y+ min | y+ max | y+ mean | snappyHexMeshDict |
|---|---|---|---|---|---|---|
| 1-A | 8,250,693 | 0.313 | 340.130 | 13.244 | snappyHexMeshDict_1A | |
| 1-B | snappyHexMeshDict_1B | |||||
| 2-A | snappyHexMeshDict_2A | |||||
| 2-B | snappyHexMeshDict_2B |
- y+ values are for ahmed-body only
Existing results
| type | decklid angle | cd | cl | solver | source |
| exp | 25 | 0.299 | 0.345 | --- | link |
|---|---|---|---|---|---|
| cfd | 0.300 | 0.316 | simpleFoam | ||
| 0.266 | 0.325 | ||||
| 0.274 | 0.330 | ||||
| 0.250 | 0.306 | ||||
| 0.260 | 0.305 | ||||
| 0.301 | 0.307 | ||||
| exp | 35 | 0.279 | 0.004 | --- | |
| cfd | 0.313 | 0.212 | simpleFoam | ||
| 0.292 | 0.156 | ||||
| 0.247 | 0.159 | ||||
| cfd | 20 | 0.262 | 0.284 | Ansys Fluent | link |
| 30 | 0.298 | 0.348 | |||
| 35 | 0.295 | 0.206 | |||
| 40 | 0.250 | 0.008 |