Omar SobhandClaude Fable 5.1
d25a36d908
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Co-Authored-By: Claude Fable 5.1 <[email protected]>
712 lines
25 KiB
Rust
712 lines
25 KiB
Rust
//! The binary ghost wall — the 2D `EmbeddedMask` on the 3D grid. Cells are
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//! fluid where φ(centre) > 0; an interior face between two cells that are
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//! not both fluid is a ghost (within 1.5 h of the surface) or solid; a
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//! ghost face is prescribed the least-squares linear reconstruction
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//! through the fluid nodes of the trilinear stencil around the probe (one
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//! cell beyond the face's mirror image along the normal) plus the foot of
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//! the normal with its surface velocity — exact for linear fields — with
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//! the profile along the normal as the fallback; the ghost faces bounding
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//! fluid cells share a flux compatibility correction.
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use super::Grid;
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use super::body::Body;
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use super::cut::CutGeometry;
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use super::step::{Boundaries, Side};
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum FaceKind {
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Fluid,
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Ghost,
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Solid,
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}
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/// The wall treatment of an embedded body.
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
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pub enum WallScheme {
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/// The 2D binary mask ported (this module).
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#[default]
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GhostBinary,
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/// The apertured cut-cell wall (item 10).
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CutCell,
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}
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#[derive(Debug, Clone, Copy)]
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pub(crate) struct StencilNode {
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pub(crate) idx: usize,
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pub(crate) x: f64,
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pub(crate) y: f64,
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pub(crate) z: f64,
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/// The trilinear weight (the fallback profile's interpolation).
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pub(crate) weight: f64,
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/// The z-direction weight alone: the least-squares weight of the node,
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/// so that a z-invariant field fits exactly as the 2D four-node fit
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/// (the two planes share the in-plane nodes' unit weight).
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pub(crate) zw: f64,
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pub(crate) fallback: Option<f64>,
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}
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#[derive(Debug, Clone)]
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pub(super) struct Ghost {
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pub(super) idx: usize,
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x: f64,
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y: f64,
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z: f64,
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foot: (f64, f64, f64),
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u_surface: f64,
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s_face: f64,
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s_probe: f64,
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nodes: Vec<StencilNode>,
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/// Outward-from-fluid sign for the compatibility correction (0 when no
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/// fluid cell is adjacent).
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pub(super) flux_sign: f64,
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}
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#[derive(Clone)]
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pub struct Mask {
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pub(super) grid: Grid,
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pub(super) periodic_z: bool,
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pub(super) cell_fluid: Vec<bool>,
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pub(super) u_kind: Vec<FaceKind>,
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pub(super) v_kind: Vec<FaceKind>,
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pub(super) w_kind: Vec<FaceKind>,
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pub(super) u_ghosts: Vec<Ghost>,
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pub(super) v_ghosts: Vec<Ghost>,
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pub(super) w_ghosts: Vec<Ghost>,
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pub(super) anchor: usize,
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pub(super) fluid_cells: usize,
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/// The cut geometry of the apertured wall (`WallScheme::CutCell`,
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/// `cutwall.rs`); `None` on the binary ghost wall.
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pub(super) cut: Option<CutGeometry>,
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/// The step-averaged apertures `½(αⁿ + αⁿ⁺¹)` of a moving cut wall
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/// (the space-time continuity: a cell's volume change over the step
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/// equals the flux through the apertures it had during it); `None` =
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/// the instantaneous ones.
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pub(super) step_apertures: Option<(Vec<f64>, Vec<f64>, Vec<f64>)>,
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/// The projection's space-time classification on a moving cut wall:
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/// a face is an unknown where its step-averaged aperture is positive,
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/// a cell has an equation where it holds fluid at either end of the
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/// step (a dying cell empties through the apertures it had); `None` =
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/// the instantaneous kinds.
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pub(super) step_open: Option<(Vec<bool>, Vec<bool>, Vec<bool>, Vec<bool>)>,
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/// Virtual merging (item 10b): the master cell of every small cell
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/// (`usize::MAX` = its own row) — a small cell shares its pressure
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/// unknown with its largest active face neighbour in the projection.
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pub(super) merge_master: Vec<usize>,
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/// The predictor's convection scheme (the exchange route replicates
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/// its limited fluxes on the faces next to prescribed ones).
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pub(super) scheme: crate::solvers::incompressible::ConvectionScheme,
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/// The fluid's density (the exchange route's convective flux).
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pub(super) density: f64,
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/// The cut wall's shear closure order (S2-4).
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pub(super) wall_order: u8,
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/// The oblique wall distance of the cut faces (S2-5).
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pub(super) wall_distance_oblique: bool,
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/// The transverse centroid correction and the fine distance floor (S2-6).
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pub(super) diffusion_transverse: bool,
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pub(super) distance_floor_fine: bool,
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pub(super) wall_advancing: bool,
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pub(super) exchange_convection_off: bool,
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/// The axis-distance implicit wall exchange (S2-5).
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pub(super) wall_exchange_axis: bool,
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/// S2-7: the momentum control volumes' side apertures from the
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/// interpolant on the sides' own corners (host prototype).
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pub(super) cv_sides_exact: bool,
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/// S2-7: the quadratic wall gradient's second point at the neighbour's
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/// own centroid distance (host prototype).
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pub(super) wall_order2_centroid: bool,
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/// S2-7b host prototypes: the axis foot's wall velocity in the solid
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/// exchange; the convective sides from the sides' own apertures.
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pub(super) wall_exchange_foot: bool,
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pub(super) conv_sides_exact: bool,
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/// The centroid prototype's pressure-gradient weights per u / v / w face.
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/// The centroid-distance cross diffusion (S2-5).
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pub(super) diffusion_centroid: bool,
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/// The open-part centroid shifts per u / v / w face, three components
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/// interleaved (built with `diffusion_centroid`).
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pub(super) face_shifts: Option<[Vec<f64>; 3]>,
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pub(super) grad_weights: Option<(Vec<f64>, Vec<f64>, Vec<f64>)>,
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}
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/// The z lattice position of a query: the lower plane index, the upper
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/// plane index and the weight of the upper plane. Periodic z wraps; a wall
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/// clamps (and a query outside the lattice takes the nearest plane).
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pub(crate) fn z_planes(gz: f64, planes: usize, periodic: bool) -> (usize, usize, f64) {
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if planes <= 1 {
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return (0, 0, 0.0);
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}
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if periodic {
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let n = planes as f64;
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let w = gz.rem_euclid(n);
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let k0 = w.floor() as usize % planes;
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((k0) % planes, (k0 + 1) % planes, w - w.floor())
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} else {
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let k0 = gz.floor().clamp(0.0, (planes - 2) as f64) as usize;
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(k0, k0 + 1, (gz - k0 as f64).clamp(0.0, 1.0))
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}
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}
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/// The nodes of velocity component `c` (0 u, 1 v, 2 w) around `point`
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/// with trilinear weights (a single plane of nodes in a direction
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/// collapses to one node), clamped in x and y, wrapped or clamped in z;
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/// `fallback(idx)` supplies the value of a node that is not a fluid face.
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pub(crate) fn stencil_nodes(
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point: (f64, f64, f64),
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c: usize,
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g: Grid,
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periodic_z: bool,
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fallback: impl Fn(usize) -> Option<f64>,
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) -> Vec<StencilNode> {
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let (nx, ny, nz, dx, dy, dz) = (g.nx, g.ny, g.nz, g.dx, g.dy, g.dz);
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// w faces on a periodic grid: the plane k = nz is the plane 0.
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let (gx, gy, gz, max_i, max_j, planes_k) = match c {
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0 => (
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point.0 / dx,
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point.1 / dy - 0.5,
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point.2 / dz - 0.5,
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nx,
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ny - 1,
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nz,
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),
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1 => (
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point.0 / dx - 0.5,
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point.1 / dy,
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point.2 / dz - 0.5,
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nx - 1,
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ny,
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nz,
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),
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_ => (
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point.0 / dx - 0.5,
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point.1 / dy - 0.5,
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point.2 / dz,
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nx - 1,
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ny - 1,
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if periodic_z { nz } else { nz + 1 },
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),
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};
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let i0 = gx.floor().clamp(0.0, (max_i.max(1) - 1) as f64) as usize;
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let j0 = gy.floor().clamp(0.0, (max_j.max(1) - 1) as f64) as usize;
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let fx = (gx - i0 as f64).clamp(0.0, 1.0);
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let fy = (gy - j0 as f64).clamp(0.0, 1.0);
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let (k0, k1, fz) = z_planes(gz, planes_k, periodic_z);
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let pos = |k: usize, j: usize, i: usize| match c {
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0 => (i as f64 * dx, (j as f64 + 0.5) * dy, (k as f64 + 0.5) * dz),
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1 => ((i as f64 + 0.5) * dx, j as f64 * dy, (k as f64 + 0.5) * dz),
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_ => ((i as f64 + 0.5) * dx, (j as f64 + 0.5) * dy, k as f64 * dz),
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};
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let index = |k: usize, j: usize, i: usize| match c {
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0 => g.uface(k, j, i),
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1 => g.vface(k, j, i),
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_ => g.wface(k, j, i),
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};
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let dirs = |m: usize, f: f64| {
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if m <= 1 {
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vec![(0usize, 1.0)]
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} else {
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vec![(0, 1.0 - f), (1, f)]
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}
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};
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let mut out = Vec::with_capacity(8);
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let kz = |dk: usize| if dk == 0 { k0 } else { k1 };
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for (dk, wk) in dirs(planes_k, fz) {
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for (dj, wj) in dirs(max_j, fy) {
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for (di, wi) in dirs(max_i, fx) {
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let (k, j, i) = (kz(dk), j0 + dj, i0 + di);
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let (x, y, z) = pos(k, j, i);
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let idx = index(k, j, i);
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out.push(StencilNode {
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idx,
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x,
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y,
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z,
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weight: wi * wj * wk,
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zw: wk,
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fallback: fallback(idx),
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});
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}
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}
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}
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out
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}
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/// Weighted least-squares fit of `a + b (x−x0) + c (y−y0) + d (z−z0)`
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/// through `pts` (each `(x, y, z, value, weight)`; zero-weight points drop
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/// out) evaluated at `at`; directions in which every weighted point has
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/// the same coordinate are dropped. `None` if the normal matrix is
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/// singular relative to its scale.
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pub(crate) fn linear_fit(pts_w: &[(f64, f64, f64, f64, f64)], at: (f64, f64, f64)) -> Option<f64> {
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let pts: Vec<(f64, f64, f64, f64, f64)> = pts_w.iter().copied().filter(|p| p.4 > 0.0).collect();
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let spread = |f: &dyn Fn(&(f64, f64, f64, f64, f64)) -> f64| {
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let (lo, hi) = pts
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.iter()
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.fold((f64::INFINITY, f64::NEG_INFINITY), |(lo, hi), p| {
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(lo.min(f(p)), hi.max(f(p)))
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});
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hi - lo > 1e-12 * (hi.abs() + lo.abs() + 1e-300)
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};
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let on = [true, spread(&|p| p.0), spread(&|p| p.1), spread(&|p| p.2)];
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let cols: Vec<usize> = (0..4).filter(|&c| on[c]).collect();
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let m = cols.len();
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if pts.len() < m {
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return None;
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}
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let mut a = vec![vec![0.0; m + 1]; m];
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for p in &pts {
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let full = [1.0, p.0 - at.0, p.1 - at.1, p.2 - at.2];
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let r: Vec<f64> = cols.iter().map(|&c| full[c]).collect();
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for i in 0..m {
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for j in 0..m {
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a[i][j] += p.4 * r[i] * r[j];
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}
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a[i][m] += p.4 * r[i] * p.3;
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}
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}
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let scale: f64 = (0..m).map(|i| a[i][i]).product();
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if scale <= 0.0 {
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return None;
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}
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let mut det = 1.0;
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for col in 0..m {
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let piv = (col..m)
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.max_by(|&p, &q| a[p][col].abs().partial_cmp(&a[q][col].abs()).unwrap())
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.unwrap();
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a.swap(col, piv);
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let d = a[col][col];
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det *= d;
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if d.abs() <= 1e-14 * scale.powf(1.0 / m as f64) {
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return None;
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}
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for r in col + 1..m {
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let f = a[r][col] / d;
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for c in col..=m {
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a[r][c] -= f * a[col][c];
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}
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}
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}
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if det.abs() <= 1e-10 * scale {
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return None;
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}
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let mut x = vec![0.0; m];
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for i in (0..m).rev() {
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let mut s = a[i][m];
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for j in i + 1..m {
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s -= a[i][j] * x[j];
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}
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x[i] = s / a[i][i];
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}
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Some(x[0])
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}
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impl Ghost {
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pub(super) fn reconstruct(&self, values: &[f64]) -> f64 {
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let mut pts: Vec<(f64, f64, f64, f64, f64)> = self
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.nodes
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.iter()
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.filter(|n| n.fallback.is_none())
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.map(|n| (n.x, n.y, n.z, values[n.idx], n.zw))
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.collect();
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pts.push((self.foot.0, self.foot.1, self.foot.2, self.u_surface, 1.0));
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if let Some(val) = linear_fit(&pts, (self.x, self.y, self.z)) {
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return val;
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}
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let mut probe = 0.0;
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for n in &self.nodes {
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probe += n.weight * n.fallback.unwrap_or_else(|| values[n.idx]);
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}
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self.u_surface + (probe - self.u_surface) * (self.s_face / self.s_probe)
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}
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}
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impl Mask {
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/// Classify the grid against `body` at `t`. A solid cell on a domain
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/// side is refused unless that side is a Velocity, SlipWall or Periodic
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/// side (an outlet may not be blocked).
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pub fn build(body: &Body, g: Grid, t: f64, b: Boundaries) -> Result<Self, String> {
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let (nx, ny, nz, dx, dy, dz) = (g.nx, g.ny, g.nz, g.dx, g.dy, g.dz);
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let periodic = b.z0 == Side::Periodic;
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let xc = |i: usize| (i as f64 + 0.5) * dx;
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let yc = |j: usize| (j as f64 + 0.5) * dy;
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let zc = |k: usize| (k as f64 + 0.5) * dz;
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let mut cell_fluid = vec![true; g.cells()];
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let mut fluid_cells = 0;
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let mut anchor = None;
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let allowed = |side: Side| matches!(side, Side::Velocity | Side::Periodic | Side::SlipWall);
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for k in 0..nz {
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for j in 0..ny {
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for i in 0..nx {
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let fluid = body.phi(xc(i), yc(j), zc(k), t) > 0.0;
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let idx = g.cell(k, j, i);
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cell_fluid[idx] = fluid;
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if fluid {
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fluid_cells += 1;
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if anchor.is_none() {
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anchor = Some(idx);
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}
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} else {
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let touches = (i == 0 && !allowed(b.x0))
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|| (i + 1 == nx && !allowed(b.x1))
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|| (j == 0 && !allowed(b.y0))
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|| (j + 1 == ny && !allowed(b.y1))
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|| (k == 0 && !allowed(b.z0))
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|| (k + 1 == nz && !allowed(b.z1));
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if touches {
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return Err(format!(
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"embedded body reaches a domain side that is not a Velocity/Periodic side at cell ({k}, {j}, {i})"
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));
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}
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}
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}
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}
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}
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let Some(anchor) = anchor else {
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return Err("embedded body covers the whole domain".into());
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};
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let h_min = dx.min(dy).min(dz);
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let reach = 1.5 * h_min;
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let eps = 1e-6 * h_min;
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let is_fluid = |k: usize, j: usize, i: usize| cell_fluid[g.cell(k, j, i)];
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let mut u_kind = vec![FaceKind::Fluid; g.n_ufaces()];
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let mut v_kind = vec![FaceKind::Fluid; g.n_vfaces()];
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let mut w_kind = vec![FaceKind::Fluid; g.n_wfaces()];
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let kind_of = |phi: f64| {
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if phi > -reach {
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FaceKind::Ghost
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} else {
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FaceKind::Solid
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}
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};
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for k in 0..nz {
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for j in 0..ny {
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for i in 1..nx {
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if !(is_fluid(k, j, i - 1) && is_fluid(k, j, i)) {
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u_kind[g.uface(k, j, i)] =
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kind_of(body.phi(i as f64 * dx, yc(j), zc(k), t));
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}
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}
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}
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for j in 1..ny {
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for i in 0..nx {
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if !(is_fluid(k, j - 1, i) && is_fluid(k, j, i)) {
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v_kind[g.vface(k, j, i)] =
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kind_of(body.phi(xc(i), j as f64 * dy, zc(k), t));
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}
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}
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}
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}
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let w_range = if periodic { 0..nz } else { 1..nz };
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for k in w_range.clone() {
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let below = if k > 0 { k - 1 } else { nz - 1 };
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for j in 0..ny {
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for i in 0..nx {
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if !(is_fluid(below, j, i) && is_fluid(k, j, i)) {
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w_kind[g.wface(k, j, i)] =
|
||
kind_of(body.phi(xc(i), yc(j), k as f64 * dz, t));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if periodic {
|
||
for j in 0..ny {
|
||
for i in 0..nx {
|
||
w_kind[g.wface(nz, j, i)] = w_kind[g.wface(0, j, i)];
|
||
}
|
||
}
|
||
}
|
||
let face_pos = |c: usize, k: usize, j: usize, i: usize| match c {
|
||
0 => (i as f64 * dx, yc(j), zc(k)),
|
||
1 => (xc(i), j as f64 * dy, zc(k)),
|
||
_ => (xc(i), yc(j), k as f64 * dz),
|
||
};
|
||
let kji_of = |c: usize, idx: usize| -> (usize, usize, usize) {
|
||
match c {
|
||
0 => (idx / ((nx + 1) * ny), (idx / (nx + 1)) % ny, idx % (nx + 1)),
|
||
1 => (idx / (nx * (ny + 1)), (idx / nx) % (ny + 1), idx % nx),
|
||
_ => (idx / (nx * ny), (idx / nx) % ny, idx % nx),
|
||
}
|
||
};
|
||
let build_ghost = |c: usize,
|
||
kinds: &[FaceKind],
|
||
idx: usize,
|
||
(x, y, z): (f64, f64, f64),
|
||
flux_sign: f64|
|
||
-> Ghost {
|
||
let s_face = body.phi(x, y, z, t);
|
||
let (n1, n2, n3) = body.normal(x, y, z, t, eps);
|
||
let foot = (x - s_face * n1, y - s_face * n2, z - s_face * n3);
|
||
let s_probe = s_face.abs() + h_min;
|
||
let probe = (
|
||
foot.0 + s_probe * n1,
|
||
foot.1 + s_probe * n2,
|
||
foot.2 + s_probe * n3,
|
||
);
|
||
let vel = body.surface_velocity(foot.0, foot.1, foot.2, t);
|
||
let u_surface = [vel.0, vel.1, vel.2][c];
|
||
let nodes = stencil_nodes(probe, c, g, periodic, |nidx| {
|
||
if kinds[nidx] == FaceKind::Fluid {
|
||
None
|
||
} else {
|
||
let (kk, jj, ii) = kji_of(c, nidx);
|
||
let (px, py, pz) = face_pos(c, kk, jj, ii);
|
||
let s = body.phi(px, py, pz, t);
|
||
let (m1, m2, m3) = body.normal(px, py, pz, t, eps);
|
||
let f = body.surface_velocity(px - s * m1, py - s * m2, pz - s * m3, t);
|
||
Some([f.0, f.1, f.2][c])
|
||
}
|
||
});
|
||
Ghost {
|
||
idx,
|
||
x,
|
||
y,
|
||
z,
|
||
foot,
|
||
u_surface,
|
||
s_face,
|
||
s_probe,
|
||
nodes,
|
||
flux_sign,
|
||
}
|
||
};
|
||
let mut u_ghosts = Vec::new();
|
||
let mut v_ghosts = Vec::new();
|
||
let mut w_ghosts = Vec::new();
|
||
for k in 0..nz {
|
||
for j in 0..ny {
|
||
for i in 1..nx {
|
||
let idx = g.uface(k, j, i);
|
||
if u_kind[idx] == FaceKind::Ghost {
|
||
let sign = if is_fluid(k, j, i - 1) {
|
||
1.0
|
||
} else if is_fluid(k, j, i) {
|
||
-1.0
|
||
} else {
|
||
0.0
|
||
};
|
||
u_ghosts.push(build_ghost(0, &u_kind, idx, face_pos(0, k, j, i), sign));
|
||
}
|
||
}
|
||
}
|
||
for j in 1..ny {
|
||
for i in 0..nx {
|
||
let idx = g.vface(k, j, i);
|
||
if v_kind[idx] == FaceKind::Ghost {
|
||
let sign = if is_fluid(k, j - 1, i) {
|
||
1.0
|
||
} else if is_fluid(k, j, i) {
|
||
-1.0
|
||
} else {
|
||
0.0
|
||
};
|
||
v_ghosts.push(build_ghost(1, &v_kind, idx, face_pos(1, k, j, i), sign));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
for k in w_range {
|
||
let below = if k > 0 { k - 1 } else { nz - 1 };
|
||
for j in 0..ny {
|
||
for i in 0..nx {
|
||
let idx = g.wface(k, j, i);
|
||
if w_kind[idx] == FaceKind::Ghost {
|
||
let sign = if is_fluid(below, j, i) {
|
||
1.0
|
||
} else if is_fluid(k, j, i) {
|
||
-1.0
|
||
} else {
|
||
0.0
|
||
};
|
||
w_ghosts.push(build_ghost(2, &w_kind, idx, face_pos(2, k, j, i), sign));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
Ok(Self {
|
||
grid: g,
|
||
periodic_z: periodic,
|
||
cell_fluid,
|
||
u_kind,
|
||
v_kind,
|
||
w_kind,
|
||
u_ghosts,
|
||
v_ghosts,
|
||
w_ghosts,
|
||
anchor,
|
||
fluid_cells,
|
||
cut: None,
|
||
step_apertures: None,
|
||
step_open: None,
|
||
merge_master: Vec::new(),
|
||
scheme: crate::solvers::incompressible::ConvectionScheme::Upwind,
|
||
density: 1.0,
|
||
wall_order: 1,
|
||
wall_distance_oblique: false,
|
||
diffusion_transverse: false,
|
||
distance_floor_fine: false,
|
||
wall_advancing: false,
|
||
exchange_convection_off: false,
|
||
wall_exchange_axis: false,
|
||
cv_sides_exact: false,
|
||
wall_order2_centroid: false,
|
||
wall_exchange_foot: false,
|
||
conv_sides_exact: false,
|
||
grad_weights: None,
|
||
diffusion_centroid: false,
|
||
face_shifts: None,
|
||
})
|
||
}
|
||
|
||
/// The step-averaged apertures of a moving cut wall (`None` at rest).
|
||
#[must_use]
|
||
pub fn step_apertures(&self) -> Option<&(Vec<f64>, Vec<f64>, Vec<f64>)> {
|
||
self.step_apertures.as_ref()
|
||
}
|
||
|
||
/// The master of a virtually merged small cell.
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn master(&self, idx: usize) -> Option<usize> {
|
||
match self.merge_master.get(idx) {
|
||
Some(&m) if m != usize::MAX => Some(m),
|
||
_ => None,
|
||
}
|
||
}
|
||
#[must_use]
|
||
pub fn merged_cells(&self) -> usize {
|
||
self.merge_master
|
||
.iter()
|
||
.filter(|&&m| m != usize::MAX)
|
||
.count()
|
||
}
|
||
|
||
// The projection's unknowns (the instantaneous kinds at rest).
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn u_open(&self, idx: usize) -> bool {
|
||
self.step_open
|
||
.as_ref()
|
||
.map_or(self.u_kind[idx] == FaceKind::Fluid, |o| o.0[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn v_open(&self, idx: usize) -> bool {
|
||
self.step_open
|
||
.as_ref()
|
||
.map_or(self.v_kind[idx] == FaceKind::Fluid, |o| o.1[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn w_open(&self, idx: usize) -> bool {
|
||
self.step_open
|
||
.as_ref()
|
||
.map_or(self.w_kind[idx] == FaceKind::Fluid, |o| o.2[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn cell_active(&self, idx: usize) -> bool {
|
||
self.step_open
|
||
.as_ref()
|
||
.map_or(self.cell_fluid[idx], |o| o.3[idx])
|
||
}
|
||
|
||
/// The step-averaged aperture of a u / v / w face (the instantaneous
|
||
/// one for a wall at rest).
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn au_step(&self, idx: usize) -> f64 {
|
||
self.step_apertures
|
||
.as_ref()
|
||
.map_or_else(|| self.a_u(idx), |a| a.0[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn av_step(&self, idx: usize) -> f64 {
|
||
self.step_apertures
|
||
.as_ref()
|
||
.map_or_else(|| self.a_v(idx), |a| a.1[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn aw_step(&self, idx: usize) -> f64 {
|
||
self.step_apertures
|
||
.as_ref()
|
||
.map_or_else(|| self.a_w(idx), |a| a.2[idx])
|
||
}
|
||
|
||
/// The cut geometry (apertured wall only).
|
||
#[must_use]
|
||
pub fn cut(&self) -> Option<&CutGeometry> {
|
||
self.cut.as_ref()
|
||
}
|
||
/// Fluid area fraction of a u / v / w face (1 on the binary wall).
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn a_u(&self, idx: usize) -> f64 {
|
||
self.cut.as_ref().map_or(1.0, |c| c.a_u[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn a_v(&self, idx: usize) -> f64 {
|
||
self.cut.as_ref().map_or(1.0, |c| c.a_v[idx])
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn a_w(&self, idx: usize) -> f64 {
|
||
self.cut.as_ref().map_or(1.0, |c| c.a_w[idx])
|
||
}
|
||
/// Fluid volume fraction of a cell (1 on the binary wall).
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn grad_weight(&self, c: usize, idx: usize) -> f64 {
|
||
self.grad_weights.as_ref().map_or(1.0, |w| match c {
|
||
0 => w.0[idx],
|
||
1 => w.1[idx],
|
||
_ => w.2[idx],
|
||
})
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn vol(&self, idx: usize) -> f64 {
|
||
self.cut.as_ref().map_or(1.0, |c| c.vol[idx])
|
||
}
|
||
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn is_fluid_cell(&self, idx: usize) -> bool {
|
||
self.cell_fluid[idx]
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn u_kind(&self, idx: usize) -> FaceKind {
|
||
self.u_kind[idx]
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn v_kind(&self, idx: usize) -> FaceKind {
|
||
self.v_kind[idx]
|
||
}
|
||
#[inline]
|
||
#[must_use]
|
||
pub fn w_kind(&self, idx: usize) -> FaceKind {
|
||
self.w_kind[idx]
|
||
}
|
||
#[must_use]
|
||
pub fn anchor(&self) -> usize {
|
||
self.anchor
|
||
}
|
||
#[must_use]
|
||
pub fn fluid_cells(&self) -> usize {
|
||
self.fluid_cells
|
||
}
|
||
#[must_use]
|
||
pub fn ghost_faces(&self) -> usize {
|
||
self.u_ghosts.len() + self.v_ghosts.len() + self.w_ghosts.len()
|
||
}
|
||
#[must_use]
|
||
pub fn grid(&self) -> Grid {
|
||
self.grid
|
||
}
|
||
#[must_use]
|
||
pub fn periodic_z(&self) -> bool {
|
||
self.periodic_z
|
||
}
|
||
}
|