Struct SpectralEmissivityModel 

pub struct SpectralEmissivityModel {
    pub wavelengths: Vec<f64>,
    pub emissivities: Vec<f64>,
}

Spectrally resolved emissivity model using piecewise linear interpolation.

Allows emissivity to vary with wavelength, which is important for selective emitters/absorbers in solar thermal and thermophotovoltaic systems.

Fields

wavelengths: Vec<f64>

Wavelengths [m] at which emissivity is specified (sorted ascending).

emissivities: Vec<f64>

Emissivity values (0–1) at each wavelength knot.

Implementations

impl SpectralEmissivityModel

pub fn new(wavelengths: Vec<f64>, emissivities: Vec<f64>) -> Self

Create from matched wavelength and emissivity vectors.

Wavelengths must be sorted in ascending order.

pub fn emissivity_at(&self, lambda: f64) -> f64

Linearly interpolate emissivity at wavelength lambda [m].

Clamps to the first/last value outside the defined range.

pub fn effective_total_emissivity(&self, temp_k: f64, n_steps: usize) -> f64

Compute the total (hemispherical) emissivity at temperature temp_k by integrating ε(λ) * E_b(λ, T) over all wavelengths.

Uses simple trapezoidal rule with n_steps intervals over the range [100 nm, 100 µm].

Trait Implementations

impl Clone for SpectralEmissivityModel

fn clone(&self) -> SpectralEmissivityModel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SpectralEmissivityModel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.