{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/physics.fluid.long_radius_nozzle/1.0.0/input.json",
  "title": "ISO 5167 long-radius nozzle — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "flow",
        "pressure",
        "coefficient"
      ],
      "description": "flow (default), pressure, or coefficient. Not venturi invert Cd, not ISA 1932, not Q=Av."
    },
    "D1": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Inlet diameter in m. Required. Envelope [50 mm, 630 mm]. Alternative: D_inlet. Do not send orifice D+d."
    },
    "D2": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Throat diameter in m. Required unless beta. Alternative: D_throat. Do not mix with beta."
    },
    "beta": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "D2/D1. Alternative to D2. Alternative: diameter_ratio. Envelope [0.20, 0.80]."
    },
    "Re_D": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Pipe Reynolds number on D1. Required as the ISO envelope [1e4, 1e7], not a term in C. Alternatives: Re, ReD. Do not send ρ, μ, v."
    },
    "dP": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Inlet-to-throat differential pressure in Pa. Required for flow. Alternatives: deltaP, dP_Pa, dp."
    },
    "rho": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Density in kg/m³. Required for flow and pressure."
    },
    "Q": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Volume flow in m³/s. Required for pressure invert. Alternative: flow, Q_m3_s."
    }
  },
  "required": [
    "D1",
    "Re_D"
  ],
  "description": "ISO 5167-3 long-radius nozzle Q=C E A2 √(2Δp/ρ) with C=0.9965−0.00653 β^{0.5}. Not ISA 1932, not given C_d=0.98, not RHG orifice, not ISO 5167-4 type C, not Q=Av, not Darcy. (calculation_version 1.0.0)"
}