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Dirichlet_EB Support #6

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Dirichlet_EB Support #6

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860edca
Update Diffusion.cpp
MR-Nozari Oct 27, 2021
267836c
Update Diffusion.H
MR-Nozari Oct 27, 2021
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16 changes: 16 additions & 0 deletions Source/Diffusion.H
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Original file line number Diff line number Diff line change
Expand Up @@ -218,6 +218,19 @@ public:
const amrex::MultiFab* const* beta,
int betaComp,
const amrex::MultiFab& beta_cc);
static void setEBDirichlet(amrex::MLEBABecLap& op,
const amrex::MultiFab &EBValue,
const amrex::MultiFab &EBBeta);
static bool useEBDirichlet() { return (Diffusion::use_EBDirichlet != 0); };

static void computeExtensiveFluxesEBDirichlet(amrex::MLMG& a_mg,
amrex::MultiFab& Soln,
amrex::MultiFab* const* flux,
amrex::MultiFab &fluxEB,
const int fluxComp,
const int nomp,
const amrex::Geometry* a_geom,
const amrex::Real fac );
#else
static void setBeta(amrex::MLABecLaplacian& op,
const amrex::MultiFab* const* beta,
Expand Down Expand Up @@ -277,6 +290,9 @@ private:
static int do_reflux;
static int max_order;
static int tensor_max_order;
#ifdef AMREX_USE_EB
static int use_EBDirichlet;
#endif
};

#endif
Expand Down
148 changes: 146 additions & 2 deletions Source/Diffusion.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,10 @@ int Diffusion::max_order;
int Diffusion::scale_abec;
int Diffusion::tensor_max_order;

#ifdef AMREX_USE_EB
int Diffusion::use_EBDirichlet;
#endif

Vector<Real> Diffusion::visc_coef;
Vector<int> Diffusion::is_diffusive;

Expand Down Expand Up @@ -98,14 +102,18 @@ Diffusion::Diffusion (Amr* Parent,
//
Diffusion::max_order = 2;
Diffusion::tensor_max_order = 2;

#ifdef AMREX_USE_EB
Diffusion::use_EBDirichlet = 0;
#endif
ParmParse ppdiff("diffuse");

ppdiff.query("v", verbose);
ppdiff.query("scale_abec", scale_abec);
ppdiff.query("max_order", max_order);
ppdiff.query("tensor_max_order", tensor_max_order);

#ifdef AMREX_USE_EB
ppdiff.query("use_EBDirichlet", use_EBDirichlet);
#endif
ppdiff.query("agglomeration", agglomeration);
ppdiff.query("consolidation", consolidation);
ppdiff.query("max_fmg_iter", max_fmg_iter);
Expand Down Expand Up @@ -1426,6 +1434,15 @@ Diffusion::setViscosity(MLEBTensorOp& tensorop,
tensorop.setEBShearViscosity(0, cc_bcoef);
}

void
Diffusion::setEBDirichlet(MLEBABecLap& op,
const MultiFab &EBValue,
const MultiFab &EBBeta)
{
AMREX_ASSERT(use_EBDirichlet);
op.setEBDirichlet(0,EBValue,EBBeta);
}

#else

void
Expand Down Expand Up @@ -1554,6 +1571,133 @@ Diffusion::computeExtensiveFluxes(MLMG& a_mg, MultiFab& Soln,
}
}

#ifdef AMREX_USE_EB
//
// return the fluxes multiplied by the area -- extensive fluxes
// and the cell-centered flux across the EB wall
//
void
Diffusion::computeExtensiveFluxesEBDirichlet(MLMG& a_mg, MultiFab& Soln,
MultiFab* const* flux,
MultiFab &fluxEB,
const int fluxComp,
const int ncomp,
const Geometry* a_geom, const Real fac )
{
AMREX_ASSERT(flux[0]->nGrow()==0);
AMREX_ASSERT(use_EBDirichlet);

AMREX_D_TERM(MultiFab flxx(*flux[0], amrex::make_alias, fluxComp, ncomp);,
MultiFab flxy(*flux[1], amrex::make_alias, fluxComp, ncomp);,
MultiFab flxz(*flux[2], amrex::make_alias, fluxComp, ncomp););
std::array<MultiFab*,AMREX_SPACEDIM> fp{AMREX_D_DECL(&flxx,&flxy,&flxz)};
MultiFab* ebfp = new MultiFab(fluxEB, amrex::make_alias, fluxComp, ncomp);

// Get regular face fluxes
a_mg.getFluxes({fp},{&Soln},MLLinOp::Location::FaceCentroid);

// For EB, get the cell-centered flux across the EB wall in cut cells
a_mg.getEBFluxes({ebfp},{&Soln});

//
// fixme? which way to define area?
//
// amrex::MultiFab area[BL_SPACEDIM];
// DistributionMapping dmap = Soln.DistributionMap();
// BoxArray ba = Soln.boxArray();
// for (int dir = 0; dir < BL_SPACEDIM; ++dir)
// {
// area[dir].clear();
// area[dir].define(ba.surroundingNodes(dir),dmap,1,nghost);
// a_geom->GetFaceArea(area[dir],dir);
// }

const Real* dx = a_geom->CellSize();
#if ( AMREX_SPACEDIM == 3 )
Real areax = dx[1]*dx[2];
Real areay = dx[0]*dx[2];
Real areaz = dx[0]*dx[1];
#else
Real areax = dx[1];
Real areay = dx[0];
#endif

auto const& ebfactory = dynamic_cast<EBFArrayBoxFactory const&>(Soln.Factory());
Array< const MultiCutFab*,AMREX_SPACEDIM> areafrac;
areafrac = ebfactory.getAreaFrac();

MFItInfo mfi_info;
if (Gpu::notInLaunchRegion()) mfi_info.EnableTiling().SetDynamic(true);

#ifdef _OPENMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(Soln, mfi_info); mfi.isValid(); ++mfi)
{
D_TERM( const auto& fx = flxx.array(mfi);,
const auto& fy = flxy.array(mfi);,
const auto& fz = flxz.array(mfi););

D_TERM( const Box ubx = mfi.nodaltilebox(0);,
const Box vbx = mfi.nodaltilebox(1);,
const Box wbx = mfi.nodaltilebox(2););

Box bx = mfi.tilebox();

const EBFArrayBox& cc_fab = static_cast<EBFArrayBox const&>(Soln[mfi]);
const EBCellFlagFab& flags = cc_fab.getEBCellFlagFab();

if ( flags.getType(amrex::grow(bx,0)) == FabType::covered )
{
//
// For now, set to very large num so we know if you accidentally use it
// MLMG will set covered fluxes to zero
//
AMREX_D_TERM(AMREX_PARALLEL_FOR_4D(ubx, ncomp, i, j, k, n, {fx(i,j,k,n) = COVERED_VAL;});,
AMREX_PARALLEL_FOR_4D(vbx, ncomp, i, j, k, n, {fy(i,j,k,n) = COVERED_VAL;});,
AMREX_PARALLEL_FOR_4D(wbx, ncomp, i, j, k, n, {fz(i,j,k,n) = COVERED_VAL;}););
}
else if ( flags.getType(amrex::grow(bx,0)) != FabType::regular )
{
AMREX_D_TERM( const auto& afrac_x = areafrac[0]->array(mfi);,
const auto& afrac_y = areafrac[1]->array(mfi);,
const auto& afrac_z = areafrac[2]->array(mfi););

D_TERM(AMREX_PARALLEL_FOR_4D(ubx, ncomp, i, j, k, n, {fx(i,j,k,n) *= fac*areax*afrac_x(i,j,k);});,
AMREX_PARALLEL_FOR_4D(vbx, ncomp, i, j, k, n, {fy(i,j,k,n) *= fac*areay*afrac_y(i,j,k);});,
AMREX_PARALLEL_FOR_4D(wbx, ncomp, i, j, k, n, {fz(i,j,k,n) *= fac*areaz*afrac_z(i,j,k);}););
}
else
{
D_TERM(AMREX_PARALLEL_FOR_4D(ubx, ncomp, i, j, k, n, {fx(i,j,k,n) *= fac*areax;});,
AMREX_PARALLEL_FOR_4D(vbx, ncomp, i, j, k, n, {fy(i,j,k,n) *= fac*areay;});,
AMREX_PARALLEL_FOR_4D(wbx, ncomp, i, j, k, n, {fz(i,j,k,n) *= fac*areaz;}););
}
}

// Scale the EB fluxes by the EB area in cut-cells
const MultiCutFab* eb_area = &(ebfactory.getBndryArea());
#ifdef _OPENMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(*ebfp, mfi_info); mfi.isValid(); ++mfi)
{
Box bx = mfi.tilebox();

const EBFArrayBox& cc_fab = static_cast<EBFArrayBox const&>(Soln[mfi]);
const EBCellFlagFab& flags = cc_fab.getEBCellFlagFab();

// Do something only in non-fully covered or regular
// if ( flags.getType(amrex::grow(bx,0)) != FabType::regular ) {
if ((flags.getType (amrex :: grow (bx, 0 ))!= FabType::regular) && (flags.getType (amrex :: grow (bx, 0 ))!= FabType::covered)) {
const auto& ebArea = eb_area->const_array(mfi);
const auto& ebFlux = ebfp->array(mfi);
AMREX_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n, {ebFlux(i,j,k,n) *= fac*ebArea(i,j,k);});
}
}
}
#endif

void
Diffusion::getViscTerms (MultiFab& visc_terms,
int src_comp,
Expand Down