ERF_ImplicitPost.H

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        // *****************************************************************************
        // Do semi-implicit solve for diffusion: q1
        // *****************************************************************************
        const bool l_do_implicit_ke    = solverChoice.implicit_ke_diffusion;
        const bool l_do_implicit_moist = solverChoice.implicit_moisture_diffusion;
        const Real l_vert_implicit_fac = solverChoice.vert_implicit_fac[level][nrk];
        if ( l_vert_implicit_fac > zero ) {
 
            const bool l_use_turb         = solverChoice.turbChoice[level].use_kturb;
            const bool l_use_stretched_dz = (solverChoice.mesh_type == MeshType::StretchedDz);
 
            if ( (l_do_implicit_ke) &&
                 (solverChoice.turbChoice[level].use_tke)) {
 
                // BCs for q1
                const BCRec* bc_ptr_h = domain_bcs_type.data();
                GpuArray<Real, AMREX_SPACEDIM*2> l_bc_neumann_vals_d;
                for (int ori = 0; ori < 2*AMREX_SPACEDIM; ori++) {
                    l_bc_neumann_vals_d[ori] = m_bc_neumann_vals[RhoKE_comp][ori];
                }
                const bool l_use_SurfLayer = false;
 
                for ( MFIter mfi(S_new[IntVars::cons],TileNoZ()); mfi.isValid(); ++mfi)
                {
                    Box bx  = mfi.tilebox();
 
                    // NOTE: We have updated the state, use that directly
                    const Array4<      Real>& cell_data  = S_new[IntVars::cons].array(mfi);
 
                    const Array4<const Real>& z_nd_arr = z_phys_nd[level]->const_array(mfi);
                    const Array4<const Real>& detJ_arr = detJ_cc[level]->const_array(mfi);
                    const Array4<const Real> mf_mx = mapfac[level][MapFacType::m_x]->const_array(mfi);
                    const Array4<const Real> mf_my = mapfac[level][MapFacType::m_y]->const_array(mfi);
                    const bool l_implicit_metric = solverChoice.implicit_terrain_metric &&
                                                   l_use_terrain_fitted_coords;
 
                    const Array4<const Real>& mu_turb = l_use_turb ? eddyDiffs->const_array(mfi) :
                                                                     Array4<const Real>{};
 
                    if (l_use_stretched_dz) {
                        ImplicitDiffForStateLU_S(bx, fine_geom.Domain(), level, RhoKE_comp,
                                                 slow_dt, l_bc_neumann_vals_d, cell_data,
                                                 stretched_dz_d[level], Array4<const Real>{},
                                                 mu_turb, solverChoice,
                                                 bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac);
                    } else if (l_use_terrain_fitted_coords) {
                        ImplicitDiffForStateLU_T(bx, fine_geom.Domain(), level, RhoKE_comp,
                                                 slow_dt, l_bc_neumann_vals_d, cell_data,
                                                 z_nd_arr, detJ_arr, dxInv, Array4<const Real>{},
                                                 mu_turb, solverChoice,
                                                 bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac,
                                                 false, mf_mx, mf_my, l_implicit_metric);
                    } else { // no terrain
                        ImplicitDiffForStateLU_N(bx, fine_geom.Domain(), level, RhoKE_comp,
                                                 slow_dt, l_bc_neumann_vals_d, cell_data,
                                                 dxInv, Array4<const Real>{}, mu_turb, solverChoice,
                                                 bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac);
                    }
                } // mfi
            } // do implicit tke and evolve tke
 
            if ( (l_do_implicit_moist) &&
                 (solverChoice.moisture_type != MoistureType::None) ) {
 
                // BCs for q1
                const BCRec* bc_ptr_h = domain_bcs_type.data();
                GpuArray<Real, AMREX_SPACEDIM*2> l_bc_neumann_vals_d;
                for (int ori = 0; ori < 2*AMREX_SPACEDIM; ori++) {
                    l_bc_neumann_vals_d[ori] = m_bc_neumann_vals[RhoQ1_comp][ori];
                }
                const bool l_use_SurfLayer = (m_SurfaceLayer[Orientation(Direction::z, Orientation::low)] != nullptr);
 
                for ( MFIter mfi(S_new[IntVars::cons],TileNoZ()); mfi.isValid(); ++mfi)
                {
                    Box bx  = mfi.tilebox();
 
                    // NOTE: We have updated the state, use that directly
                    const Array4<      Real>& cell_data  = S_new[IntVars::cons].array(mfi);
 
                    const Array4<const Real>& z_nd_arr = z_phys_nd[level]->const_array(mfi);
                    const Array4<const Real>& detJ_arr = detJ_cc[level]->const_array(mfi);
                    const Array4<const Real> mf_mx = mapfac[level][MapFacType::m_x]->const_array(mfi);
                    const Array4<const Real> mf_my = mapfac[level][MapFacType::m_y]->const_array(mfi);
                    const bool l_implicit_metric = solverChoice.implicit_terrain_metric &&
                                                   l_use_terrain_fitted_coords;
 
                    const Array4<const Real>& mu_turb = l_use_turb ? eddyDiffs->const_array(mfi) :
                                                                     Array4<const Real>{};
                    const Array4<const Real>& q1fx_z = Q1fx3->const_array(mfi);
                    const bool l_use_mrf_cg = solverChoice.turbChoice[level].enable_mrf_countergradient
                                                && (solverChoice.turbChoice[level].pbl_type == PBLType::MRF);
                     if (l_use_stretched_dz) {
                         ImplicitDiffForStateLU_S(bx, fine_geom.Domain(), level, RhoQ1_comp,
                                                  slow_dt, l_bc_neumann_vals_d, cell_data,
                                                  stretched_dz_d[level], q1fx_z,
                                                  mu_turb, solverChoice,
                                                  bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac,
                                                  l_use_mrf_cg);
                     } else if (l_use_terrain_fitted_coords) {
                         ImplicitDiffForStateLU_T(bx, fine_geom.Domain(), level, RhoQ1_comp,
                                                  slow_dt, l_bc_neumann_vals_d, cell_data,
                                                  z_nd_arr, detJ_arr, dxInv, q1fx_z,
                                                  mu_turb, solverChoice,
                                                  bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac,
                                                  l_use_mrf_cg,
                                                  mf_mx, mf_my, l_implicit_metric);
                     } else { // no terrain
                         ImplicitDiffForStateLU_N(bx, fine_geom.Domain(), level, RhoQ1_comp,
                                                  slow_dt, l_bc_neumann_vals_d, cell_data,
                                                  dxInv, q1fx_z, mu_turb, solverChoice,
                                                  bc_ptr_h, l_use_SurfLayer, l_vert_implicit_fac,
                                                  l_use_mrf_cg);
                     }
                } // mfi
            } // if moist model and do implicit diff
        } // implicit vertical factor > 0