fixup maxwell rhs matrix

This commit is contained in:
Magnus Ulimoen 2020-06-15 21:24:19 +02:00
parent 459581a3c9
commit 9e22f239c2
1 changed files with 157 additions and 204 deletions

View File

@ -13,242 +13,195 @@ pub fn implicit_matrix(rhs: sprs::CsMatView<Float>, dt: Float) -> sprs::CsMat<Fl
/// Assumes self boundaries
pub fn rhs_matrix(op: &dyn SbpOperator2d, ny: usize, nx: usize) -> sprs::CsMat<Float> {
let d1_x = op.op_eta().diff_matrix(nx);
let d1_y = op.op_xi().diff_matrix(ny);
let eye = |n: usize| sprs::CsMat::eye(n);
let ix = sprs::CsMat::<Float>::eye(nx);
let iy = sprs::CsMat::eye(ny);
let fluxes = {
let d1_x = op.op_eta().diff_matrix(nx);
let d1_y = op.op_xi().diff_matrix(ny);
let dx = sparse_sparse_outer_product(iy.view(), d1_x.view());
let dy = sparse_sparse_outer_product(d1_y.view(), ix.view());
let dx = sparse_sparse_outer_product(eye(ny).view(), d1_x.view());
let dy = sparse_sparse_outer_product(d1_y.view(), eye(nx).view());
let mut a_flux = sprs::TriMat::new((3, 3));
a_flux.add_triplet(1, 2, -1.0);
a_flux.add_triplet(2, 1, -1.0);
let a_flux = a_flux.to_csr();
let mut a_flux = sprs::CsMat::zero((3, 3));
a_flux.insert(1, 2, -1.0);
a_flux.insert(2, 1, -1.0);
let mut b_flux = sprs::TriMat::new((3, 3));
b_flux.add_triplet(0, 1, 1.0);
b_flux.add_triplet(1, 0, 1.0);
let b_flux = b_flux.to_csr();
let mut b_flux = sprs::CsMat::zero((3, 3));
b_flux.insert(0, 1, 1.0);
b_flux.insert(1, 0, 1.0);
let f = &sparse_sparse_outer_product(a_flux.view(), dx.view())
+ &sparse_sparse_outer_product(b_flux.view(), dy.view());
&sparse_sparse_outer_product(a_flux.view(), dx.view())
+ &sparse_sparse_outer_product(b_flux.view(), dy.view())
};
let mut hx = sparse_sparse_outer_product(iy.view(), op.op_xi().h_matrix(nx).view());
hx.map_inplace(|h| 1.0 / h);
let ihx = hx;
let mut hy = sparse_sparse_outer_product(op.op_eta().h_matrix(ny).view(), ix.view());
hy.map_inplace(|h| 1.0 / h);
let ihy = hy;
let _f = {
let sat_west = {
// West boundary
let mut aminus = sprs::TriMat::new((3, 3));
aminus.add_triplet(1, 1, -0.5);
aminus.add_triplet(1, 2, -0.5);
aminus.add_triplet(2, 1, -0.5);
aminus.add_triplet(2, 2, -0.5);
let aminus = aminus.to_csr();
let aminus = {
let mut aminus = sprs::CsMat::zero((3, 3));
aminus.insert(1, 1, -0.5);
aminus.insert(1, 2, -0.5);
aminus.insert(2, 1, -0.5);
aminus.insert(2, 2, -0.5);
aminus
};
let e0 = {
let mut e0 = sprs::CsMat::zero((nx, 1));
e0.insert(0, 0, 1.0);
e0
};
let en = {
let mut en = sprs::CsMat::zero((nx, 1));
en.insert(nx - 1, 0, 1.0);
en
};
let mut e0x = sprs::TriMat::new((nx, 1));
e0x.add_triplet(0, 0, 1.0);
let e0x = e0x.to_csr();
let e0x_nt = &e0x * &e0x.transpose_view();
let e0x_nt = sparse_sparse_outer_product(iy.view(), e0x_nt.view());
// Periodic => (e_0 - e_n)q => 0
let p = &e0 - &en;
let sat0 = &ihx * &e0x_nt;
let mut sat0 = sparse_sparse_outer_product(aminus.view(), sat0.view());
// Forming the matrix of size (nx,nx)
let mat = &e0 * &p.transpose_view();
// Must be scaled by the h norm
let hi = op.op_xi().h_matrix(nx).map(|h| 1.0 / h);
let mat = &hi * &mat;
// Upscaling to (nx * ny, nx * ny)
let mat = sparse_sparse_outer_product(eye(ny).view(), mat.view());
let mut sat = sparse_sparse_outer_product(aminus.view(), mat.view());
let tau = 1.0;
sat0.map_inplace(|x| tau * x);
&f + &sat0
// Scaling by tau
sat.map_inplace(|x| tau * x);
sat
};
let _f = {
let sat_east = {
// East boundary
let mut aplus = sprs::TriMat::new((3, 3));
aplus.add_triplet(1, 1, 0.5);
aplus.add_triplet(1, 2, -0.5);
aplus.add_triplet(2, 1, -0.5);
aplus.add_triplet(2, 2, 0.5);
let aplus = aplus.to_csr();
let aminus = {
let mut aplus = sprs::CsMat::zero((3, 3));
aplus.insert(1, 1, 0.5);
aplus.insert(1, 2, -0.5);
aplus.insert(2, 1, -0.5);
aplus.insert(2, 2, 0.5);
aplus
};
let e0 = {
let mut e0 = sprs::CsMat::zero((nx, 1));
e0.insert(0, 0, 1.0);
e0
};
let en = {
let mut en = sprs::CsMat::zero((nx, 1));
en.insert(nx - 1, 0, 1.0);
en
};
let mut enx = sprs::TriMat::new((nx, 1));
enx.add_triplet(nx - 1, 0, 1.0);
let enx = enx.to_csr();
let enx_nt = &enx * &enx.transpose_view();
let enx_nt = sparse_sparse_outer_product(iy.view(), enx_nt.view());
// Periodic => (e_0 - e_n) => 0
let p = &en - &e0;
let satn = &ihx * &enx_nt;
let mut satn = sparse_sparse_outer_product(aplus.view(), satn.view());
// Forming the matrix of size (nx,nx)
let mat = &en * &p.transpose_view();
// Must be scaled by the h norm
let hi = op.op_xi().h_matrix(nx).map(|h| 1.0 / h);
let mat = &hi * &mat;
// Upscaling to (nx * ny, nx * ny)
let mat = sparse_sparse_outer_product(eye(ny).view(), mat.view());
let mut sat = sparse_sparse_outer_product(aminus.view(), mat.view());
let tau = -1.0;
satn.map_inplace(|x| tau * x);
&f + &satn
// Scaling by tau
sat.map_inplace(|x| tau * x);
sat
};
let _f = {
let sat_south = {
// South boundary
let mut bminus = sprs::TriMat::new((3, 3));
bminus.add_triplet(0, 0, -0.5);
bminus.add_triplet(0, 1, 0.5);
bminus.add_triplet(1, 0, 0.5);
bminus.add_triplet(1, 1, -0.5);
let bminus = bminus.to_csr();
let bminus = {
let mut bminus = sprs::CsMat::zero((3, 3));
bminus.insert(0, 0, -0.5);
bminus.insert(0, 1, 0.5);
bminus.insert(1, 0, 0.5);
bminus.insert(1, 1, -0.5);
bminus
};
let e0 = {
let mut e0 = sprs::CsMat::zero((ny, 1));
e0.insert(0, 0, 1.0);
e0
};
let en = {
let mut en = sprs::CsMat::zero((ny, 1));
en.insert(ny - 1, 0, 1.0);
en
};
let mut e0y = sprs::TriMat::new((ny, 1));
e0y.add_triplet(0, 0, 1.0);
let e0y = e0y.to_csr();
let e0y_nt = &e0y * &e0y.transpose_view();
let e0y_nt = sparse_sparse_outer_product(e0y_nt.view(), ix.view());
// Periodic => (e_0 - e_n) => 0
let p = &e0 - &en;
let sat0 = &ihx * &e0y_nt;
let mut sat0 = sparse_sparse_outer_product(bminus.view(), sat0.view());
// Forming the matrix of size (ny,ny)
let mat = &e0 * &p.transpose_view();
// Must be scaled by the h norm
let hi = op.op_eta().h_matrix(ny).map(|h| 1.0 / h);
let mat = &hi * &mat;
// Upscaling to (nx * ny, nx * ny)
let mat = sparse_sparse_outer_product(mat.view(), eye(nx).view());
let mut sat = sparse_sparse_outer_product(bminus.view(), mat.view());
let tau = 1.0;
sat0.map_inplace(|x| tau * x);
&f + &sat0
// Scaling by tau
sat.map_inplace(|x| tau * x);
sat
};
let _f = {
let sat_north = {
// North boundary
let mut bplus = sprs::TriMat::new((3, 3));
bplus.add_triplet(0, 0, 0.5);
bplus.add_triplet(0, 1, 0.5);
bplus.add_triplet(1, 0, 0.5);
bplus.add_triplet(1, 1, 0.5);
let bplus = bplus.to_csr();
let bplus = {
let mut bplus = sprs::CsMat::zero((3, 3));
bplus.insert(0, 0, 0.5);
bplus.insert(0, 1, 0.5);
bplus.insert(1, 0, 0.5);
bplus.insert(1, 1, 0.5);
bplus
};
let e0 = {
let mut e0 = sprs::CsMat::zero((ny, 1));
e0.insert(0, 0, 1.0);
e0
};
let en = {
let mut en = sprs::CsMat::zero((ny, 1));
en.insert(ny - 1, 0, 1.0);
en
};
let mut eny = sprs::TriMat::new((ny, 1));
eny.add_triplet(ny - 1, 0, 1.0);
let eny = eny.to_csr();
let eny_nt = &eny * &eny.transpose_view();
let eny_nt = sparse_sparse_outer_product(eny_nt.view(), ix.view());
// Periodic => (e_0 - e_n) => 0
let p = &en - &e0;
let satn = &ihy * &eny_nt;
let mut satn = sparse_sparse_outer_product(bplus.view(), satn.view());
// Forming the matrix of size (ny,ny)
let mat = &en * &p.transpose_view();
// Must be scaled by the h norm
let hi = op.op_eta().h_matrix(ny).map(|h| 1.0 / h);
let mat = &hi * &mat;
// Upscaling to (nx * ny, nx * ny)
let mat = sparse_sparse_outer_product(mat.view(), eye(nx).view());
let mut sat = sparse_sparse_outer_product(bplus.view(), mat.view());
let tau = -1.0;
satn.map_inplace(|x| tau * x);
&f + &satn
};
// Setting up the periodic boundaries
let _f = {
// West
let mut aminus = sprs::TriMat::new((3, 3));
aminus.add_triplet(1, 1, -0.5);
aminus.add_triplet(1, 2, -0.5);
aminus.add_triplet(2, 1, -0.5);
aminus.add_triplet(2, 2, -0.5);
let aminus = aminus.to_csr();
let mut e0x = sprs::TriMat::new((nx, 1));
e0x.add_triplet(0, 0, 1.0);
let e0x = e0x.to_csr();
let mut enx = sprs::TriMat::new((nx, 1));
enx.add_triplet(nx - 1, 0, 1.0);
let enx = enx.to_csr();
let e0nx_nt = &e0x * &enx.transpose_view();
let e0nx_nt = sparse_sparse_outer_product(iy.view(), e0nx_nt.view());
let sat0 = &ihx * &e0nx_nt;
let mut sat0 = sparse_sparse_outer_product(aminus.view(), sat0.view());
let tau = 1.0;
// Negative => subtracting this boundary
sat0.map_inplace(|x| -tau * x);
&f + &sat0
// Scaling by tau
sat.map_inplace(|x| tau * x);
sat
};
let _f = {
// East boundary
let mut aplus = sprs::TriMat::new((3, 3));
aplus.add_triplet(1, 1, 0.5);
aplus.add_triplet(1, 2, -0.5);
aplus.add_triplet(2, 1, -0.5);
aplus.add_triplet(2, 2, 0.5);
let aplus = aplus.to_csr();
let mut enx = sprs::TriMat::new((nx, 1));
enx.add_triplet(nx - 1, 0, 1.0);
let enx = enx.to_csr();
let mut e0x = sprs::TriMat::new((nx, 1));
e0x.add_triplet(0, 0, 1.0);
let e0x = e0x.to_csr();
let en0x_nt = &enx * &e0x.transpose_view();
let en0x_nt = sparse_sparse_outer_product(iy.view(), en0x_nt.view());
let satn = &ihx * &en0x_nt;
let mut satn = sparse_sparse_outer_product(aplus.view(), satn.view());
let tau = -1.0;
satn.map_inplace(|x| -tau * x);
&f + &satn
};
let _f = {
// South boundary
let mut bminus = sprs::TriMat::new((3, 3));
bminus.add_triplet(0, 0, -0.5);
bminus.add_triplet(0, 1, 0.5);
bminus.add_triplet(1, 0, 0.5);
bminus.add_triplet(1, 1, -0.5);
let bminus = bminus.to_csr();
let mut e0y = sprs::TriMat::new((ny, 1));
e0y.add_triplet(0, 0, 1.0);
let e0y = e0y.to_csr();
let mut eny = sprs::TriMat::new((ny, 1));
eny.add_triplet(ny - 1, 0, 1.0);
let eny = eny.to_csr();
let e0ny_nt = &e0y * &eny.transpose_view();
let e0ny_nt = sparse_sparse_outer_product(e0ny_nt.view(), ix.view());
let sat0 = &ihx * &e0ny_nt;
let mut sat0 = sparse_sparse_outer_product(bminus.view(), sat0.view());
let tau = 1.0;
sat0.map_inplace(|x| -tau * x);
&f + &sat0
};
let _f = {
// North boundary
let mut bplus = sprs::TriMat::new((3, 3));
bplus.add_triplet(0, 0, 0.5);
bplus.add_triplet(0, 1, 0.5);
bplus.add_triplet(1, 0, 0.5);
bplus.add_triplet(1, 1, 0.5);
let bplus = bplus.to_csr();
let mut eny = sprs::TriMat::new((ny, 1));
eny.add_triplet(ny - 1, 0, 1.0);
let eny = eny.to_csr();
let mut e0y = sprs::TriMat::new((ny, 1));
e0y.add_triplet(0, 0, 1.0);
let e0y = e0y.to_csr();
let en0y_nt = &eny * &e0y.transpose_view();
let en0y_nt = sparse_sparse_outer_product(en0y_nt.view(), ix.view());
let satn = &ihy * &en0y_nt;
let mut satn = sparse_sparse_outer_product(bplus.view(), satn.view());
let tau = -1.0;
satn.map_inplace(|x| -tau * x);
&f + &satn
};
f
&fluxes + &(&(&sat_west + &sat_east) + &(&sat_north + &sat_south))
}
#[test]
fn dummy() {
let ny = 16;
let nx = 17;
let rhs = rhs_matrix(&sbp::operators::Upwind4, ny, nx);
let _lhs = implicit_matrix(rhs.view(), 1e-2);
}