/**
 * PhysicalQuantity — Branded numeric types for dimensional safety.
 *
 * Uses TypeScript's structural type system with branded intersections
 * to prevent mixing incompatible physical quantities at compile time.
 * All internal computation uses SI base units; conversion happens
 * only at system boundaries (user input, data export).
 *
 * References:
 *   BIPM SI Brochure (9th ed., 2019) — base unit definitions
 *   NIST SP 811 — Guide for the Use of the International System of Units
 */
/**
 * Encodes SI base-unit exponents: [kg, m, s, K, A, mol, cd].
 * Example: Force (N = kg·m/s²) → [1, 1, -2, 0, 0, 0, 0]
 */
export type DimensionVector = readonly [
    kg: number,
    m: number,
    s: number,
    K: number,
    A: number,
    mol: number,
    cd: number
];
declare const __brand: unique symbol;
/**
 * A number carrying a compile-time dimensional brand.
 * At runtime it's just a number — zero overhead.
 */
export type Quantity<Brand extends string> = number & {
    readonly [__brand]: Brand;
};
/** Temperature in Kelvin (K) */
export type Temperature = Quantity<'Temperature_K'>;
/** Pressure in Pascals (Pa = kg/(m·s²)) */
export type Pressure = Quantity<'Pressure_Pa'>;
/** Force in Newtons (N = kg·m/s²) */
export type Force = Quantity<'Force_N'>;
/** Length in meters (m) */
export type Length = Quantity<'Length_m'>;
/** Area in square meters (m²) */
export type Area = Quantity<'Area_m2'>;
/** Volume in cubic meters (m³) */
export type Volume = Quantity<'Volume_m3'>;
/** Time in seconds (s) */
export type Time = Quantity<'Time_s'>;
/** Mass in kilograms (kg) */
export type Mass = Quantity<'Mass_kg'>;
/** Density in kg/m³ */
export type Density = Quantity<'Density_kg_m3'>;
/** Velocity in m/s */
export type Velocity = Quantity<'Velocity_m_s'>;
/** Thermal conductivity in W/(m·K) */
export type ThermalConductivity = Quantity<'ThermalConductivity_W_mK'>;
/** Specific heat capacity in J/(kg·K) */
export type SpecificHeat = Quantity<'SpecificHeat_J_kgK'>;
/** Thermal diffusivity in m²/s */
export type ThermalDiffusivity = Quantity<'ThermalDiffusivity_m2_s'>;
/** Heat transfer coefficient in W/(m²·K) */
export type HeatTransferCoefficient = Quantity<'HTC_W_m2K'>;
/** Heat flux in W/m² */
export type HeatFlux = Quantity<'HeatFlux_W_m2'>;
/** Power / heat output in Watts (W = kg·m²/s³) */
export type Power = Quantity<'Power_W'>;
/** Energy in Joules (J = kg·m²/s²) */
export type Energy = Quantity<'Energy_J'>;
/** Young's modulus in Pascals (Pa) */
export type YoungsModulus = Quantity<'YoungsModulus_Pa'>;
/** Yield strength in Pascals (Pa) */
export type YieldStrength = Quantity<'YieldStrength_Pa'>;
/** Stress in Pascals (Pa) */
export type Stress = Quantity<'Stress_Pa'>;
/** Acceleration in m/s² */
export type Acceleration = Quantity<'Acceleration_m_s2'>;
/** Strain (dimensionless) */
export type Strain = Quantity<'Strain'>;
/** Poisson's ratio (dimensionless, 0 < v < 0.5) */
export type PoissonRatio = Quantity<'PoissonRatio'>;
/** Dynamic viscosity in Pa·s */
export type DynamicViscosity = Quantity<'DynamicViscosity_Pa_s'>;
/** Kinematic viscosity in m²/s */
export type KinematicViscosity = Quantity<'KinematicViscosity_m2_s'>;
/** Flow rate in m³/s */
export type FlowRate = Quantity<'FlowRate_m3_s'>;
/** Pipe roughness (dimensionless Darcy-Weisbach friction factor) */
export type Roughness = Quantity<'Roughness'>;
/**
 * Wrap a raw number as a specific physical quantity.
 * Use at system boundaries where raw numbers enter the simulation.
 */
export declare function temperature(value: number): Temperature;
export declare function pressure(value: number): Pressure;
export declare function force(value: number): Force;
export declare function length(value: number): Length;
export declare function area(value: number): Area;
export declare function volume(value: number): Volume;
export declare function time(value: number): Time;
export declare function mass(value: number): Mass;
export declare function density(value: number): Density;
export declare function velocity(value: number): Velocity;
export declare function thermalConductivity(value: number): ThermalConductivity;
export declare function specificHeat(value: number): SpecificHeat;
export declare function thermalDiffusivity(value: number): ThermalDiffusivity;
export declare function heatTransferCoefficient(value: number): HeatTransferCoefficient;
export declare function power(value: number): Power;
export declare function energy(value: number): Energy;
export declare function youngsModulus(value: number): YoungsModulus;
export declare function yieldStrength(value: number): YieldStrength;
export declare function stress(value: number): Stress;
export declare function acceleration(value: number): Acceleration;
export declare function strain(value: number): Strain;
export declare function poissonRatio(value: number): PoissonRatio;
export declare function dynamicViscosity(value: number): DynamicViscosity;
export declare function kinematicViscosity(value: number): KinematicViscosity;
export declare function flowRate(value: number): FlowRate;
export declare function roughness(value: number): Roughness;
/**
 * Temperature conversions — all return Kelvin (SI base).
 */
export declare function celsiusToKelvin(celsius: number): Temperature;
export declare function kelvinToCelsius(kelvin: Temperature): number;
export declare function fahrenheitToKelvin(fahrenheit: number): Temperature;
export declare function kelvinToFahrenheit(kelvin: Temperature): number;
/**
 * Pressure conversions — all return Pascals (SI base).
 */
export declare function barToPascal(bar: number): Pressure;
export declare function pascalToBar(pascal: Pressure): number;
export declare function psiToPascal(psi: number): Pressure;
export declare function pascalToPsi(pascal: Pressure): number;
export declare function atmToPascal(atm: number): Pressure;
export declare function pascalToAtm(pascal: Pressure): number;
/**
 * Length conversions — all return meters (SI base).
 */
export declare function millimetersToMeters(mm: number): Length;
export declare function metersToMillimeters(m: Length): number;
export declare function inchesToMeters(inches: number): Length;
export declare function metersToInches(m: Length): number;
export declare function feetToMeters(feet: number): Length;
export declare function metersToFeet(m: Length): number;
/**
 * Power / energy conversions.
 */
export declare function kilowattsToWatts(kw: number): Power;
export declare function wattsToKilowatts(w: Power): number;
export declare function btuPerHourToWatts(btu_hr: number): Power;
export declare function wattsToBtuPerHour(w: Power): number;
/**
 * Flow rate conversions — all return m³/s (SI base).
 */
export declare function litersPerSecondToM3s(lps: number): FlowRate;
export declare function m3sToLitersPerSecond(m3s: FlowRate): number;
export declare function gallonsPerMinuteToM3s(gpm: number): FlowRate;
export declare function m3sToGallonsPerMinute(m3s: FlowRate): number;
export {};
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