Struct ParticipatingMedia 

pub struct ParticipatingMedia {
    pub kappa: f64,
    pub sigma_s: f64,
    pub temperature: f64,
}

Participating media (gas radiation) model.

Models radiative transfer through an absorbing/emitting gas via the mean-beam-length approximation.

Reference: Modest, “Radiative Heat Transfer”, 3rd ed.

Fields

kappa: f64

Absorption coefficient κ [1/m].

sigma_s: f64

Scattering coefficient σ_s [1/m].

temperature: f64

Temperature of the medium [K].

Implementations

impl ParticipatingMedia

pub fn new(kappa: f64, sigma_s: f64, temperature: f64) -> Self

Create a new participating media model.

pub fn extinction(&self) -> f64

Extinction coefficient β = κ + σ_s [1/m].

pub fn albedo(&self) -> f64

Single-scattering albedo ω = σ_s / β.

pub fn optical_depth(&self, path_length: f64) -> f64

Optical depth over a path length L: τ = β · L.

pub fn transmittance(&self, path_length: f64) -> f64

Transmittance through a slab of thickness L: T = exp(-τ).

pub fn emission_optically_thin(&self, path_length: f64) -> f64

Emitted radiation from a gas column of thickness L [W/m²].

q_emit = κ · σ · T⁴ · L (optically thin approximation)

pub fn effective_emissivity(&self, path_length: f64) -> f64

Effective emissivity of a gas layer of thickness L.

ε_eff = 1 - exp(-κ·L) (gray gas approximation)

pub fn mean_beam_length_sphere(radius: f64) -> f64

Mean-beam length for a sphere of radius R: L_m = 0.65 * 2R.

pub fn mean_beam_length_cylinder(radius: f64) -> f64

Mean-beam length for a cylinder (infinite, radius R): L_m = 0.95 * 2R.

Trait Implementations

impl Clone for ParticipatingMedia

fn clone(&self) -> ParticipatingMedia

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParticipatingMedia

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

Formats the value using the given formatter.