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feat(src): Enabled Vacuume Region Generation

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Stroid can now generate vacuume regions. These are confirming spheres marked with a seperate attribute that solver may then apply arbitrary mappings to. Further, the boundary of this region is also marked with a seperate boundary attrite allowing seperate boundary conditions to easily be applied.
This commit is contained in:
Emily Boudreaux
2026-03-20 12:57:47 -04:00
parent 475fce5fca
commit b24e0377f6
13 changed files with 214 additions and 53 deletions
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45
src/lib/topology/topology.cpp
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@@ -10,7 +10,7 @@ namespace stroid::topology {
std::unique_ptr<mfem::Mesh> BuildSkeleton(const fourdst::config::Config<config::MeshConfig> & config) {
int nVert = config->include_external_domain ? 24 : 16;
int nElem = config->include_external_domain ? 13 : 7;
int nBev = 6;
int nBev = config->include_external_domain ? 12 : 6;
auto mesh = std::make_unique<mfem::Mesh>(3, nVert, nElem, nBev, 3);
@@ -28,9 +28,9 @@ namespace stroid::topology {
}
const int core_v[8] = {0, 1, 3, 2, 4, 5, 7, 6};
mesh->AddHex(core_v, 1);
mesh->AddHex(core_v, config->core_id);
int shells[6][8] = {
std::vector<std::array<int, 8>> stellar_shells = {
{8, 9, 11, 10, 0, 1, 3, 2},
{4, 5, 7, 6, 12, 13, 15, 14}, // +Z face
{0, 1, 5, 4, 8, 9, 13, 12}, // -Y face
@@ -38,9 +38,25 @@ namespace stroid::topology {
{1, 3, 7, 5, 9, 11, 15, 13}, // +X face
{0, 4, 6, 2, 8, 12, 14, 10} // -X face
};
for (const auto & shell : shells) mesh->AddHex(shell, 2);
for (const auto & shell : stellar_shells) {
mesh->AddHex(shell.data(), config->envelope_id);
}
const int bdr_quads[6][4] = {
if (config->include_external_domain) {
std::vector<std::array<int, 8>> vacuum_shells;
vacuum_shells.push_back({8, 9, 13, 12, 16, 17, 21, 20});
vacuum_shells.push_back({9, 11, 15, 13, 17, 19, 23, 21});
vacuum_shells.push_back({11, 10, 14, 15, 19, 18, 22, 23});
vacuum_shells.push_back({10, 8, 12, 14, 18, 16, 20, 22});
vacuum_shells.push_back({12, 13, 15, 14, 20, 21, 23, 22});
vacuum_shells.push_back({10, 11, 9, 8, 18, 19, 17, 16});
for (const auto & shell : vacuum_shells) {
mesh->AddHex(shell.data(), config->vacuum_id);
}
}
const int surface_bdr_quads[6][4] = {
{12, 13, 15, 14},
{13, 9, 11, 15},
{9, 8, 10, 11},
@@ -49,8 +65,23 @@ namespace stroid::topology {
{14, 15, 11, 10}
};
for (const auto& bdr: bdr_quads) {
mesh->AddBdrQuad(bdr, 1);
for (const auto& bdr: surface_bdr_quads) {
mesh->AddBdrQuad(bdr, config->surface_bdr_id);
}
if (config->include_external_domain) {
const int inf_bdr_quads[6][4] = {
{16, 17, 21, 20},
{17, 19, 23, 21},
{19, 18, 22, 23},
{18, 16, 20, 22},
{18, 19, 17, 16},
{20, 21, 23, 22}
};
for (const auto& bdr: inf_bdr_quads) {
mesh->AddBdrQuad(bdr, config->inf_bdr_id);
}
}
return mesh;