1 // Copyright (c) 2017-2025, Lawrence Livermore National Security, LLC and other CEED contributors. 2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3 // 4 // SPDX-License-Identifier: BSD-2-Clause 5 // 6 // This file is part of CEED: http://github.com/ceed 7 8 /// @file 9 /// Setup DM for Navier-Stokes example using PETSc 10 11 #include <ceed.h> 12 #include <petscdmplex.h> 13 #include <petscds.h> 14 15 #include "../navierstokes.h" 16 #include "../problems/stg_shur14.h" 17 18 // Create mesh 19 PetscErrorCode CreateDM(MPI_Comm comm, ProblemData problem, MatType mat_type, VecType vec_type, DM *dm) { 20 PetscFunctionBeginUser; 21 // Create DMPLEX 22 PetscCall(DMCreate(comm, dm)); 23 PetscCall(DMSetType(*dm, DMPLEX)); 24 { 25 PetscBool skip = PETSC_TRUE; 26 PetscCall(PetscOptionsGetBool(NULL, NULL, "-dm_mat_preallocate_skip", &skip, NULL)); 27 PetscCall(DMSetMatrixPreallocateSkip(*dm, skip)); 28 } 29 PetscCall(DMSetMatType(*dm, mat_type)); 30 PetscCall(DMSetVecType(*dm, vec_type)); 31 32 // Set Tensor elements 33 PetscCall(PetscOptionsSetValue(NULL, "-dm_plex_simplex", "0")); 34 PetscCall(PetscOptionsSetValue(NULL, "-dm_sparse_localize", "0")); 35 PetscCall(PetscOptionsSetValue(NULL, "-dm_localize", "0")); // Localization done in DMSetupByOrderEnd_FEM 36 PetscCall(PetscOptionsSetValue(NULL, "-dm_blocking_type", "field_node")); 37 38 // Set CL options 39 PetscCall(DMSetFromOptions(*dm)); 40 PetscCall(DMViewFromOptions(*dm, NULL, "-dm_view")); 41 PetscFunctionReturn(PETSC_SUCCESS); 42 } 43 44 // Setup DM 45 PetscErrorCode SetUpDM(DM dm, ProblemData problem, PetscInt degree, PetscInt q_extra, SimpleBC bc, Physics phys) { 46 PetscInt num_comp_q = 5; 47 PetscFunctionBeginUser; 48 49 PetscCall(DMSetupByOrderBegin_FEM(PETSC_TRUE, PETSC_TRUE, degree, PETSC_DECIDE, q_extra, 1, &num_comp_q, dm)); 50 51 { // Add strong boundary conditions to DM 52 DMLabel label; 53 PetscCall(DMGetLabel(dm, "Face Sets", &label)); 54 PetscCall(DMPlexLabelComplete(dm, label)); 55 56 for (PetscInt i = 0; i < problem->num_bc_defs; i++) { 57 BCDefinition bc_def = problem->bc_defs[i]; 58 PetscInt num_essential_comps, num_label_values; 59 const PetscInt *essential_comps, *label_values; 60 const char *name; 61 62 PetscCall(BCDefinitionGetEssential(bc_def, &num_essential_comps, &essential_comps)); 63 if (essential_comps > 0) { 64 PetscCall(BCDefinitionGetInfo(bc_def, &name, &num_label_values, &label_values)); 65 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, name, label, num_label_values, label_values, 0, num_essential_comps, essential_comps, NULL, NULL, 66 NULL, NULL)); 67 } 68 } 69 { 70 PetscBool use_strongstg = PETSC_FALSE; 71 PetscCall(PetscOptionsGetBool(NULL, NULL, "-stg_strong", &use_strongstg, NULL)); 72 if (use_strongstg) PetscCall(SetupStrongStg(dm, bc, problem, phys)); 73 } 74 } 75 76 PetscCall(DMSetupByOrderEnd_FEM(PETSC_TRUE, dm)); 77 78 // Empty name for conserved field (because there is only one field) 79 PetscSection section; 80 PetscCall(DMGetLocalSection(dm, §ion)); 81 PetscCall(PetscSectionSetFieldName(section, 0, "")); 82 switch (phys->state_var) { 83 case STATEVAR_CONSERVATIVE: 84 PetscCall(PetscSectionSetComponentName(section, 0, 0, "Density")); 85 PetscCall(PetscSectionSetComponentName(section, 0, 1, "MomentumX")); 86 PetscCall(PetscSectionSetComponentName(section, 0, 2, "MomentumY")); 87 PetscCall(PetscSectionSetComponentName(section, 0, 3, "MomentumZ")); 88 PetscCall(PetscSectionSetComponentName(section, 0, 4, "TotalEnergy")); 89 break; 90 91 case STATEVAR_PRIMITIVE: 92 PetscCall(PetscSectionSetComponentName(section, 0, 0, "Pressure")); 93 PetscCall(PetscSectionSetComponentName(section, 0, 1, "VelocityX")); 94 PetscCall(PetscSectionSetComponentName(section, 0, 2, "VelocityY")); 95 PetscCall(PetscSectionSetComponentName(section, 0, 3, "VelocityZ")); 96 PetscCall(PetscSectionSetComponentName(section, 0, 4, "Temperature")); 97 break; 98 99 case STATEVAR_ENTROPY: 100 PetscCall(PetscSectionSetComponentName(section, 0, 0, "EntropyDensity")); 101 PetscCall(PetscSectionSetComponentName(section, 0, 1, "EntropyMomentumX")); 102 PetscCall(PetscSectionSetComponentName(section, 0, 2, "EntropyMomentumY")); 103 PetscCall(PetscSectionSetComponentName(section, 0, 3, "EntropyMomentumZ")); 104 PetscCall(PetscSectionSetComponentName(section, 0, 4, "EntropyTotalEnergy")); 105 break; 106 } 107 PetscFunctionReturn(PETSC_SUCCESS); 108 } 109 110 // Refine DM for high-order viz 111 PetscErrorCode VizRefineDM(DM dm, User user, ProblemData problem, SimpleBC bc, Physics phys) { 112 DM dm_hierarchy[user->app_ctx->viz_refine + 1]; 113 VecType vec_type; 114 115 PetscFunctionBeginUser; 116 PetscCall(DMPlexSetRefinementUniform(dm, PETSC_TRUE)); 117 118 dm_hierarchy[0] = dm; 119 for (PetscInt i = 0, d = user->app_ctx->degree; i < user->app_ctx->viz_refine; i++) { 120 Mat interp_next; 121 PetscCall(DMRefine(dm_hierarchy[i], MPI_COMM_NULL, &dm_hierarchy[i + 1])); 122 PetscCall(DMClearDS(dm_hierarchy[i + 1])); 123 PetscCall(DMClearFields(dm_hierarchy[i + 1])); 124 PetscCall(DMSetCoarseDM(dm_hierarchy[i + 1], dm_hierarchy[i])); 125 d = (d + 1) / 2; 126 PetscInt q_order = d + user->app_ctx->q_extra; 127 if (i + 1 == user->app_ctx->viz_refine) d = 1; 128 PetscCall(DMGetVecType(dm, &vec_type)); 129 PetscCall(DMSetVecType(dm_hierarchy[i + 1], vec_type)); 130 PetscCall(SetUpDM(dm_hierarchy[i + 1], problem, d, q_order, bc, phys)); 131 PetscCall(DMCreateInterpolation(dm_hierarchy[i], dm_hierarchy[i + 1], &interp_next, NULL)); 132 if (!i) user->interp_viz = interp_next; 133 else { 134 Mat C; 135 PetscCall(MatMatMult(interp_next, user->interp_viz, MAT_INITIAL_MATRIX, PETSC_DECIDE, &C)); 136 PetscCall(MatDestroy(&interp_next)); 137 PetscCall(MatDestroy(&user->interp_viz)); 138 user->interp_viz = C; 139 } 140 } 141 for (PetscInt i = 1; i < user->app_ctx->viz_refine; i++) { 142 PetscCall(DMDestroy(&dm_hierarchy[i])); 143 } 144 user->dm_viz = dm_hierarchy[user->app_ctx->viz_refine]; 145 PetscFunctionReturn(PETSC_SUCCESS); 146 } 147