{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/physics.fluid.cavitation.input.json",
  "title": "Cavitation number — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "number",
        "pressure",
        "vapor",
        "velocity"
      ],
      "description": "number (default), pressure, vapor, or velocity. Not NPSH, Thoma, Weber, Euler, or Q=Av."
    },
    "p": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Absolute reference pressure in Pa. Required except pressure invert. Alternatives: p_Pa, p_inf."
    },
    "p_v": {
      "type": "number",
      "minimum": 0,
      "description": "Absolute vapor pressure in Pa. Required except vapor invert. Alternatives: pv, p_vapor."
    },
    "v": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Characteristic speed in m/s. Required except velocity invert. Alternative: v_m_s."
    },
    "v_m_s": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Characteristic speed in m/s (query/UI). REST may send v."
    },
    "sigma": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Cavitation number (dimensionless). Required for invert. Alternatives: cav, cavitation. Not Weber σ in N/m."
    },
    "rho": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Density in kg/m³. Optional; default 1000."
    }
  },
  "description": "σ=(p−p_v)/(½ρv²). Not NPSH, not Thoma NPSH/H, not Weber, not Euler Eu=Δp/(ρv²). (calculation_version 1.0.0)"
}