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Multi-level Hypre: Fix periodic boundary bug #4090

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Aug 18, 2024
Merged

Multi-level Hypre: Fix periodic boundary bug #4090

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18 changes: 18 additions & 0 deletions Src/Extern/HYPRE/AMReX_HypreMLABecLap.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -411,6 +411,15 @@ void HypreMLABecLap::addNonStencilEntriesToGraph ()
m_f2c_offset.resize(m_nlevels-1);
m_f2c_values.resize(m_nlevels-1);

Vector<IntVect> period(m_nlevels);
Vector<IntVect> smallend(m_nlevels);
Vector<IntVect> bigend(m_nlevels);
for (int ilev = 0; ilev <m_nlevels; ++ilev) {
period[ilev] = m_geom[ilev].Domain().length();
smallend[ilev] = m_geom[ilev].Domain().smallEnd();
bigend[ilev] = m_geom[ilev].Domain().bigEnd();
}

for (auto& entry : entries) {
auto const from_level = std::get<0>(entry);
auto const to_level = std::get<3>(entry);
Expand All @@ -424,6 +433,15 @@ void HypreMLABecLap::addNonStencilEntriesToGraph ()
GpuArray<HYPRE_Int,AMREX_SPACEDIM> to_index{AMREX_D_DECL(to_iv[0],
to_iv[1],
to_iv[2])};
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim) {
if (m_geom[0].isPeriodic(idim)) {
if (to_index[idim] < smallend[to_level][idim]) {
to_index[idim] += period[to_level][idim];
} else if (to_index[idim] > bigend[to_level][idim]) {
to_index[idim] -= period[to_level][idim];
}
}
}
constexpr int ivar = 0;
HYPRE_SStructGraphAddEntries(m_ss_graph,
from_level, from_index.data(), ivar,
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