use one-sided PPM stencils at reflecting BCs

Source/hydro/Castro_ctu_hydro.cpp

@@ -219,11 +219,11 @@ Castro::construct_ctu_hydro_source(Real time, Real dt)  // NOLINT(readability-co
 
       Array4<Real const> const U_old_arr = Sborder.array(mfi);
 
-      rho_inv.resize(qbx3, 1);
+      rho_inv.resize(qbx, 1);
       fab_size += rho_inv.nBytes();
       Array4<Real> const rho_inv_arr = rho_inv.array();
 
-      amrex::ParallelFor(qbx3,
+      amrex::ParallelFor(qbx,
       [=] AMREX_GPU_DEVICE (int i, int j, int k) noexcept
       {
           rho_inv_arr(i,j,k) = 1.0 / U_old_arr(i,j,k,URHO);
@@ -472,6 +472,8 @@ Castro::construct_ctu_hydro_source(Real time, Real dt)  // NOLINT(readability-co
                           shk_arr,
                           0, false);
 
+      enforce_reflect_states(xbx, 0, qxm_arr, qxp_arr);
+
 #endif // 1-d
 
 
@@ -587,6 +589,8 @@ Castro::construct_ctu_hydro_source(Real time, Real dt)  // NOLINT(readability-co
 
 #endif
 
+      enforce_reflect_states(xbx, 0, ql_arr, qr_arr);
+
       cmpflx_plus_godunov(xbx,
                           ql_arr, qr_arr,
                           flux0_arr,
@@ -631,6 +635,8 @@ Castro::construct_ctu_hydro_source(Real time, Real dt)  // NOLINT(readability-co
 #endif
 #endif
 
+      enforce_reflect_states(ybx, 1, ql_arr, qr_arr);
+
       cmpflx_plus_godunov(ybx,
                           ql_arr, qr_arr,
                           flux1_arr,

Source/hydro/Castro_mol.cpp

@@ -155,6 +155,20 @@ Castro::mol_ppm_reconstruct(const Box& bx,
                             Array4<Real> const& qm,
                             Array4<Real> const& qp) {
 
+  // special care for reflecting BCs
+  const int* lo_bc = phys_bc.lo();
+  const int* hi_bc = phys_bc.hi();
+
+  const auto domlo = geom.Domain().loVect3d();
+  const auto domhi = geom.Domain().hiVect3d();
+
+  const auto dx = geom.CellSizeArray();
+
+  bool lo_bc_test = lo_bc[idir] == amrex::PhysBCType::symmetry;
+  bool hi_bc_test = hi_bc[idir] == amrex::PhysBCType::symmetry;
+
+  bool is_axisymmetric = geom.Coord() == 1
+;
   amrex::ParallelFor(bx, NQ,
   [=] AMREX_GPU_DEVICE (int i, int j, int k, int n) noexcept
   {
@@ -165,7 +179,9 @@ Castro::mol_ppm_reconstruct(const Box& bx,
     Real sp;
 
     load_stencil(q_arr, idir, i, j, k, n, s);
-    ppm_reconstruct(s, flat, sm, sp);
+    ppm_reconstruct(s, i, j, k, idir, dx[idir],
+                    lo_bc_test, hi_bc_test, is_axisymmetric, domlo, domhi,
+                    flat, sm, sp);
 
     if (idir == 0) {
       // right state at i-1/2