# NASA 2DN00 — NACA 0012 Airfoil

Validation case from the **NASA TMR Collaborative Testing Challenge 2022** ([turb-prs2022](https://tmbwg.github.io/turbmodels/turb-prs2022.html)).

Four AoA: **α = 10°, 15°, 17°, 18°** (canonical challenge spec).

## Required metrics
1. **CL vs. α**
2. **CD vs. CL**
3. **Cp vs. x/c** at each AoA — compared with experiment
4. **Cf vs. x/c (upper surface)** at each AoA — no experiment available, reported for inspection

## Folder layout
```
NASA_2DN00/
├── baseline_komegasst/   k-ω SST integral profiles (.dat + .csv) — one set per AoA zone
├── highfidelity/         Ladson + Gregory experiments + CFL3D SST cross-check
└── plots/                Pre-rendered comparison figures + plot_profiles.py
```

The full per-AoA OpenFOAM cases (mesh, fields, run scripts) are hosted separately on the heavy CFD-asset Hugging Face dataset linked in the paper.

## Solver / setup
- **Solver**: `rhoSimpleFoam` (compressible steady)
- **Turbulence model**: `kOmegaSST` (baseline, no augmentation)
- **Grid**: 449 × 129, NASA TMR third-finest
- **Re**: 6×10⁶ (Ladson) / 2.88×10⁶ (Gregory)
- **Mach**: 0.15

## Submission format
Three files matching the columns of the bundled baseline:
- `2DN00_cl_cd.csv`         — `zone`, `alpha, deg`, `cl`, `cd` (single zone, four rows)
- `2DN00_cp_at4alphas.csv`  — `zone`, `x/c`, `cp` (one zone per AoA: `alpha=10 deg`, `alpha=15 deg`, `alpha=17 deg`, `alpha=18 deg`)
- `2DN00_cf_at4alphas.csv`  — `zone`, `x/c`, `cf` (same zone structure as Cp)

Then `python plots/plot_profiles.py` overlays the baseline + reference + your model.