{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/physics.fluid.froude/1.0.0/input.json",
  "title": "Froude number — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "Fr",
        "velocity",
        "length"
      ],
      "description": "Fr (default), velocity, or length. Not Reynolds, Manning, Chezy, or Q=Av."
    },
    "v": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Speed in m/s. Required except velocity invert. Alternative: v_m_s."
    },
    "v_m_s": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Speed in m/s (query/UI). REST may send v."
    },
    "L": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Characteristic length in m, often hydraulic depth. Required except length invert. Alternative: L_m."
    },
    "Fr": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Froude number. Required for velocity and length invert. Do not send with Fr mode."
    },
    "g": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Gravity in m/s². Default 9.80665. Alternative: g_m_s2."
    }
  },
  "description": "Open-channel Fr=v/√(gL). Default g=9.80665. Not Reynolds, not Manning, not Chezy, not Q=Av. (calculation_version 1.0.0)"
}