{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/physics.fluid.pipe_exit/1.0.0/input.json",
  "title": "Pipe exit — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "head",
        "pressure",
        "velocity"
      ],
      "description": "head (default), pressure, or velocity. Not catalog K, inlet geometry, sudden expansion, or Q=Av."
    },
    "v_m_s": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Mean speed in the pipe in m/s. Required except velocity invert. Alternative: speed. Do not send query v (that is calculation_version)."
    },
    "speed": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Mean speed in m/s (REST alias of v_m_s)."
    },
    "h": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Head loss in m. Required for velocity invert. Alternatives: hm, h_m."
    },
    "h_m": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Head loss in m (query/UI). REST may send h."
    },
    "rho": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Density in kg/m³. Optional; default 1000."
    },
    "g": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Gravity in m/s². Optional; default 9.80665."
    }
  },
  "description": "Pipe into a large reservoir h=K v²/(2g) with K=1. Not catalog K, not pipe-entrance geometry, not sudden expansion (v1−v2)², not Q=Av. (calculation_version 1.0.0)"
}