Struct PyLbmGrid 

pub struct PyLbmGrid { /* private fields */ }

D2Q9 Lattice-Boltzmann grid simulation.

Stores distribution functions for all 9 velocity directions at every cell. Uses the BGK collision operator with a single relaxation time.

Implementations

impl PyLbmGrid

pub fn new(config: &PyLbmConfig) -> Self

Create a new LBM grid from configuration. All cells initialised to equilibrium with unit density and zero velocity.

pub fn width(&self) -> usize

Return the grid width.

pub fn height(&self) -> usize

Return the grid height.

pub fn step_count(&self) -> u64

Return the number of completed steps.

pub fn step(&mut self)

Advance the simulation by one LBM time step.

Performs: collision (BGK) + streaming + periodic bounce-back walls.

pub fn velocity_at(&self, x: usize, y: usize) -> [f64; 2]

Get the macroscopic velocity [ux, uy] at cell (x, y).

Returns [0.0, 0.0] if coordinates are out of bounds.

pub fn density_at(&self, x: usize, y: usize) -> f64

Get the macroscopic density at cell (x, y).

pub fn velocity_field(&self) -> Vec<f64>

Return the entire velocity field as a flat Vecf64of[ux, uy]` pairs, row-major order (x-major).

pub fn density_field(&self) -> Vec<f64>

Return the entire density field as a flat Vecf64`, row-major.

Trait Implementations

impl Clone for PyLbmGrid

fn clone(&self) -> PyLbmGrid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PyLbmGrid

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

Formats the value using the given formatter.