# NASA 2DZP — 2D Zero-Pressure-Gradient Flat Plate

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

## Required metrics
1. **Cf vs. x** — skin-friction along plate
2. **u⁺ vs. log₁₀(y⁺)** at x = 0.97 — boundary-layer profile compared with theory

## Folder layout
```
NASA_2DZP/
├── baseline_komegasst/   k-ω SST RANS integral profiles (.dat + .csv)
├── highfidelity/         Theory + experimental references (.dat + .csv)
└── plots/                Pre-rendered comparison figures + plot_profiles.py
```

The full OpenFOAM case (mesh, fields, run scripts, extraction code) is 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**: 545 × 385, finest of NASA TMR sequence
- **Re_L**: 5×10⁶ (L = 2)
- **Inflow**: M = 0.2

## Submission format
Provide two files (CSV or Tecplot .dat) matching the columns of the bundled baseline:
- `2DZP_cf.csv`   — columns: `zone`, `x`, `Cf`
- `2DZP_u+y+.csv` — columns: `zone`, `log(y+)`, `u+`

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