Struct CflCondition 

pub struct CflCondition {
    pub dx: f64,
    pub dt: f64,
    pub speed: f64,
    pub diffusivity: f64,
}

Stability criterion checker for explicit finite-difference schemes.

The Courant–Friedrichs–Lewy (CFL) number must satisfy ν ≤ 1 (advection) or α ≤ 0.5 (diffusion) for stability of explicit schemes.

Fields

dx: f64

Grid spacing Δx.

dt: f64

Time step Δt.

speed: f64

Wave / advection speed (m/s).

diffusivity: f64

Diffusion coefficient (m²/s).

Implementations

impl CflCondition

pub fn new(dx: f64, dt: f64, speed: f64, diffusivity: f64) -> Self

Construct a new CflCondition.

pub fn advective_cfl(&self) -> f64

Advective CFL number c·Δt/Δx. Must be ≤ 1 for explicit upwind/leapfrog.

pub fn diffusive_cfl(&self) -> f64

Diffusive CFL number α·Δt/Δx². Must be ≤ 0.5 for explicit FTCS.

pub fn is_advection_stable(&self) -> bool

Returns true if the advective CFL condition is satisfied (≤ 1).

pub fn is_diffusion_stable(&self) -> bool

Returns true if the diffusive CFL condition is satisfied (≤ 0.5).

Trait Implementations

impl Clone for CflCondition

fn clone(&self) -> CflCondition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CflCondition

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

Formats the value using the given formatter.