{
  "scenario": "foil",
  "real": {
    "fields": [
      {"key": "u", "shape": "(T, H, W)"},
      {"key": "v", "shape": "(T, H, W)"}
    ]
  },
  "numerical": {
    "fields": [
      {"key": "u", "shape": "(T, H, W)"},
      {"key": "v", "shape": "(T, H, W)"},
      {"key": "p", "shape": "(T, H, W)"}
    ]
  },
  "note": "Each field is stored as a separate column in the Arrow dataset. Geometric parameters (angle of attack, Reynolds number) are stored in the *_params_*.json index files."
}