{
  "Fr1": 2.5,
  "theta_deg": 15.0,
  "h1": 1.0,
  "g": 9.81,
  "domain": {
    "xmin": 0.0,
    "xmax": 40.0,
    "ymin": 0.0,
    "ymax": 30.0
  },
  "frame": "wall frame: slip wall along y = 0 from x = 0; incoming flow at 15° towards the wall",
  "boundaries": {
    "south": "slip wall",
    "west": "upstream state imposed",
    "north": "upstream state imposed",
    "east": "zero-gradient outflow (supercritical, Fr2 = 1.58)"
  }
}