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MLMG: Minimum domain width #4129

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merged 1 commit into from
Sep 5, 2024
Merged

MLMG: Minimum domain width #4129

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2 changes: 1 addition & 1 deletion Src/LinearSolvers/MLMG/AMReX_MLABecLaplacian.H
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Original file line number Diff line number Diff line change
Expand Up @@ -1281,7 +1281,7 @@ MLABecLaplacianT<MF>::supportNSolve () const
bool support = false;
if (this->m_overset_mask[0][0]) {
if (this->m_geom[0].back().Domain().coarsenable(MLLinOp::mg_coarsen_ratio,
MLLinOp::mg_domain_min_width)
this->mg_domain_min_width)
&& this->m_grids[0].back().coarsenable(MLLinOp::mg_coarsen_ratio, MLLinOp::mg_box_min_width))
{
support = true;
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15 changes: 10 additions & 5 deletions Src/LinearSolvers/MLMG/AMReX_MLLinOp.H
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Original file line number Diff line number Diff line change
Expand Up @@ -570,11 +570,7 @@ protected:

static constexpr int mg_coarsen_ratio = 2;
static constexpr int mg_box_min_width = 2;
#ifdef AMREX_USE_EB
static constexpr int mg_domain_min_width = 4;
#else
static constexpr int mg_domain_min_width = 2;
#endif
int mg_domain_min_width = 2;

LPInfo info;

Expand Down Expand Up @@ -803,6 +799,15 @@ MLLinOpT<MF>::defineGrids (const Vector<Geometry>& a_geom,
{
BL_PROFILE("MLLinOp::defineGrids()");

#ifdef AMREX_USE_EB
if ( ! a_factory.empty() ) {
auto const* ebf = dynamic_cast<EBFArrayBoxFactory const*>(a_factory[0]);
if (ebf && !(ebf->isAllRegular())) { // Has non-trivial EB
mg_domain_min_width = 4;
}
}
#endif

m_num_amr_levels = 0;
for (int amrlev = 0; amrlev < a_geom.size(); amrlev++) {
if (!a_grids[amrlev].empty()) {
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