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Make GAMMA into a static

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This commit is contained in:
Magnus Ulimoen
2021-06-30 18:20:44 +02:00
parent 94e49ff9b5
commit 3ceeeb8ca1
7 changed files with 40 additions and 23 deletions
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1
euler/Cargo.toml
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@@ -16,6 +16,7 @@ sbp = { path = "../sbp" }
arrayvec = "0.6.0"
serde = { version = "1.0.115", default-features = false, optional = true, features = ["derive"] }
integrate = { path = "../utils/integrate" }
once_cell = "1.7.2"
[dev-dependencies]
criterion = "0.3.2"

3
euler/src/eval.rs
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@@ -85,10 +85,11 @@ impl<'a, D: Dimension, BP: EvaluatorPressure<D>> Evaluator<D>
eva.u(t, x.view(), y.view(), rho.view(), rhou.view_mut());
eva.v(t, x.view(), y.view(), rho.view(), rhov.view_mut());
eva.p(t, x, y, rho.view(), rhou.view(), rhov.view(), e.view_mut());
let gamma = *GAMMA.get().expect("GAMMA is not defined");
azip!((rho in &rho, u in &rhou, v in &rhov, e in &mut e) {
let p = *e;
*e = p / (GAMMA - 1.0) + rho * (u*u + v*v) / 2.0;
*e = p / (gamma - 1.0) + rho * (u*u + v*v) / 2.0;
});
azip!((rho in &rho, rhou in &mut rhou) *rhou *= rho);

29
euler/src/lib.rs
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@@ -1,6 +1,7 @@
pub use arrayvec::ArrayVec;
use ndarray::azip;
use ndarray::prelude::*;
use once_cell::sync::OnceCell;
use sbp::grid::{Grid, Metrics};
use sbp::operators::{InterpolationOperator, SbpOperator2d, UpwindOperator2d};
use sbp::utils::Direction;
@@ -11,7 +12,7 @@ use eval::Evaluator;
mod vortex;
pub use vortex::{VortexParameters, Vortice};
pub const GAMMA: Float = 1.4;
pub static GAMMA: OnceCell<Float> = OnceCell::new();
// A collection of buffers that allows one to efficiently
// move to the next state
@@ -566,6 +567,7 @@ fn upwind_dissipation(
metrics: &Metrics,
tmp: (&mut Field, &mut Field),
) {
let gamma = *GAMMA.get().expect("GAMMA is not defined");
for (((FieldValue { rho, rhou, rhov, e }, tmp0), tmp1), metric) in y
.iter()
.zip(tmp.0.iter_mut())
@@ -580,9 +582,9 @@ fn upwind_dissipation(
let uhat = metric.detj_dxi_dx * u + metric.detj_dxi_dy * v;
let vhat = metric.detj_deta_dx * u + metric.detj_deta_dy * v;
let p = pressure(GAMMA, rho, rhou, rhov, e);
let p = pressure(gamma, rho, rhou, rhov, e);
assert!(p > 0.0);
let c = (GAMMA * p / rho).sqrt();
let c = (gamma * p / rho).sqrt();
// The accurate hypot is very slow, and the accuracy is
// not that important in this case
@@ -625,9 +627,11 @@ fn fluxes(k: (&mut Field, &mut Field), y: &Field, metrics: &Metrics, wb: &mut Fi
let rhov = y.rhov();
let e = y.e();
let gamma = *GAMMA.get().expect("GAMMA is not defined");
let mut p = wb.rho_mut();
azip!((p in &mut p, &rho in &rho, &rhou in &rhou, &rhov in &rhov, &e in &e) {
*p = pressure(GAMMA, rho, rhou, rhov, e)
*p = pressure(gamma, rho, rhou, rhov, e)
});
let (mut c0, c1, mut c2, c3) = k.0.components_mut();
@@ -1059,6 +1063,7 @@ fn SAT_characteristic(
assert_eq!(y.shape(), z.shape());
assert_eq!(y.shape()[0], 4);
assert_eq!(y.shape()[1], detj.shape()[0]);
let gamma = *GAMMA.get().expect("GAMMA is not defined");
for (((((mut k, y), z), detj), detj_d_dx), detj_d_dy) in k
.axis_iter_mut(ndarray::Axis(1))
@@ -1086,19 +1091,19 @@ fn SAT_characteristic(
let theta = kx * u + ky * v;
let p = pressure(GAMMA, rho, rhou, rhov, e);
let c = (GAMMA * p / rho).sqrt();
let phi2 = (GAMMA - 1.0) * (u * u + v * v) / 2.0;
let p = pressure(gamma, rho, rhou, rhov, e);
let c = (gamma * p / rho).sqrt();
let phi2 = (gamma - 1.0) * (u * u + v * v) / 2.0;
let alpha = rho / (sbp::consts::SQRT_2 * c);
let phi2_c2 = (phi2 + c * c) / (GAMMA - 1.0);
let phi2_c2 = (phi2 + c * c) / (gamma - 1.0);
#[rustfmt::skip]
let T = [
[ 1.0, 0.0, alpha, alpha],
[ u, ky, alpha*(u + kx * c), alpha*(u - kx * c)],
[ v, -kx, alpha*(v + ky * c), alpha*(v - ky * c)],
[phi2 / (GAMMA - 1.0), rho*(ky * u - kx * v), alpha*(phi2_c2 + c * theta), alpha*(phi2_c2 - c * theta)],
[phi2 / (gamma - 1.0), rho*(ky * u - kx * v), alpha*(phi2_c2 + c * theta), alpha*(phi2_c2 - c * theta)],
];
let U = kx_ * u + ky_ * v;
let L = [
@@ -1110,10 +1115,10 @@ fn SAT_characteristic(
let beta = 1.0 / (2.0 * c * c);
#[rustfmt::skip]
let TI = [
[ 1.0 - phi2 / (c * c), (GAMMA - 1.0) * u / (c * c), (GAMMA - 1.0) * v / (c * c), -(GAMMA - 1.0) / (c * c)],
[ 1.0 - phi2 / (c * c), (gamma - 1.0) * u / (c * c), (gamma - 1.0) * v / (c * c), -(gamma - 1.0) / (c * c)],
[ -(ky * u - kx * v)/rho, ky/rho, -kx/rho, 0.0],
[beta * (phi2 - c * theta), beta * (kx * c - (GAMMA - 1.0) * u), beta * (ky * c - (GAMMA - 1.0) * v), beta * (GAMMA - 1.0)],
[beta * (phi2 + c * theta), -beta * (kx * c + (GAMMA - 1.0) * u), -beta * (ky * c + (GAMMA - 1.0) * v), beta * (GAMMA - 1.0)],
[beta * (phi2 - c * theta), beta * (kx * c - (gamma - 1.0) * u), beta * (ky * c - (gamma - 1.0) * v), beta * (gamma - 1.0)],
[beta * (phi2 + c * theta), -beta * (kx * c + (gamma - 1.0) * u), -beta * (ky * c + (gamma - 1.0) * v), beta * (gamma - 1.0)],
];
let res = [rho - z[0], rhou - z[1], rhov - z[2], e - z[3]];

17
euler/src/vortex.rs
View File

@@ -33,13 +33,14 @@ impl<D: Dimension> eval::Evaluator<D> for VortexParameters {
rhov: ArrayViewMut<Float, D>,
e: ArrayViewMut<Float, D>,
) {
let gamma = *GAMMA.get().expect("GAMMA is not defined");
let m = self.mach;
let p_inf = 1.0 / (GAMMA * m * m);
let p_inf = 1.0 / (gamma * m * m);
let rho_inf: Float = 1.0;
let u_inf: Float = 1.0;
let v_inf: Float = 0.0;
let e_inf = p_inf / (GAMMA - 1.0) + rho_inf * (u_inf.powi(2) + v_inf.powi(2)) / 2.0;
let e_inf = p_inf / (gamma - 1.0) + rho_inf * (u_inf.powi(2) + v_inf.powi(2)) / 2.0;
azip!((rho in rho,
rhou in rhou,
@@ -69,9 +70,9 @@ impl<D: Dimension> eval::Evaluator<D> for VortexParameters {
let dy = y - vortice.y0;
let f = (1.0 - (dx*dx + dy*dy))/(rstar*rstar);
*rho = Float::powf(1.0 - eps*eps*(GAMMA - 1.0)*m*m/(8.0*PI*PI*p_inf*rstar*rstar)*f.exp(), 1.0/(GAMMA - 1.0));
*rho = Float::powf(1.0 - eps*eps*(gamma - 1.0)*m*m/(8.0*PI*PI*p_inf*rstar*rstar)*f.exp(), 1.0/(gamma - 1.0));
assert!(*rho > 0.0);
let p = Float::powf(*rho, GAMMA)*p_inf;
let p = Float::powf(*rho, gamma)*p_inf;
let u = 1.0 - eps*dy/(2.0*PI*p_inf.sqrt()*rstar*rstar)*(f/2.0).exp();
let v = eps*dx/(2.0*PI*p_inf.sqrt()*rstar*rstar)*(f/2.0).exp();
@@ -80,7 +81,7 @@ impl<D: Dimension> eval::Evaluator<D> for VortexParameters {
assert!(*rho > 0.0);
*rhou = *rho*u;
*rhov = *rho*v;
*e = p/(GAMMA - 1.0) + *rho*(u*u + v*v)/2.0;
*e = p/(gamma - 1.0) + *rho*(u*u + v*v)/2.0;
}
}
@@ -94,8 +95,8 @@ impl<D: Dimension> eval::Evaluator<D> for VortexParameters {
let dy = y - vortice.y0;
let f = (1.0 - (dx*dx + dy*dy))/(rstar*rstar);
let rho_vortice = Float::powf(1.0 - eps*eps*(GAMMA - 1.0)*m*m/(8.0*PI*PI*p_inf*rstar*rstar)*f.exp(), 1.0/(GAMMA - 1.0));
let p = Float::powf(rho_vortice, GAMMA)*p_inf;
let rho_vortice = Float::powf(1.0 - eps*eps*(gamma - 1.0)*m*m/(8.0*PI*PI*p_inf*rstar*rstar)*f.exp(), 1.0/(gamma - 1.0));
let p = Float::powf(rho_vortice, gamma)*p_inf;
let u = 1.0 - eps*dy/(2.0*PI*p_inf.sqrt()*rstar*rstar)*(f/2.0).exp();
let v = eps*dx/(2.0*PI*p_inf.sqrt()*rstar*rstar)*(f/2.0).exp();
@@ -106,7 +107,7 @@ impl<D: Dimension> eval::Evaluator<D> for VortexParameters {
assert!(*rho > 0.0);
*rhou += rho_vortice*u - rho_inf*u_inf;
*rhov += rho_vortice*v - rho_inf*v_inf;
*e += (p/(GAMMA - 1.0) + rho_vortice*(u*u + v*v)/2.0) - e_inf;
*e += (p/(gamma - 1.0) + rho_vortice*(u*u + v*v)/2.0) - e_inf;
}
});
}