1 // Copyright (c) 2017-2022, 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 /// DM setup for solid mechanics example using PETSc 10 11 #include "../include/setup-dm.h" 12 13 #include "../include/boundary.h" 14 15 // ----------------------------------------------------------------------------- 16 // Setup DM 17 // ----------------------------------------------------------------------------- 18 PetscErrorCode CreateBCLabel(DM dm, const char name[]) { 19 DMLabel label; 20 21 PetscFunctionBeginUser; 22 23 PetscCall(DMCreateLabel(dm, name)); 24 PetscCall(DMGetLabel(dm, name, &label)); 25 PetscCall(DMPlexMarkBoundaryFaces(dm, 1, label)); 26 27 PetscFunctionReturn(0); 28 }; 29 30 // Read mesh and distribute DM in parallel 31 PetscErrorCode CreateDistributedDM(MPI_Comm comm, AppCtx app_ctx, DM *dm) { 32 const char *filename = app_ctx->mesh_file; 33 PetscBool interpolate = PETSC_TRUE; 34 DM distributed_mesh = NULL; 35 PetscPartitioner part; 36 37 PetscFunctionBeginUser; 38 39 if (!*filename) { 40 PetscInt dim = 3, faces[3] = {3, 3, 3}; 41 PetscCall(PetscOptionsGetIntArray(NULL, NULL, "-dm_plex_box_faces", faces, &dim, NULL)); 42 if (!dim) dim = 3; 43 PetscCall(DMPlexCreateBoxMesh(comm, dim, PETSC_FALSE, faces, NULL, NULL, NULL, interpolate, dm)); 44 } else { 45 PetscCall(DMPlexCreateFromFile(comm, filename, NULL, interpolate, dm)); 46 } 47 48 // Distribute DM in parallel 49 PetscCall(DMPlexGetPartitioner(*dm, &part)); 50 PetscCall(PetscPartitionerSetFromOptions(part)); 51 PetscCall(DMPlexDistribute(*dm, 0, NULL, &distributed_mesh)); 52 if (distributed_mesh) { 53 PetscCall(DMDestroy(dm)); 54 *dm = distributed_mesh; 55 } 56 PetscCall(DMViewFromOptions(*dm, NULL, "-dm_view")); 57 58 PetscFunctionReturn(0); 59 }; 60 61 // Setup DM with FE space of appropriate degree 62 PetscErrorCode SetupDMByDegree(DM dm, AppCtx app_ctx, PetscInt order, PetscBool boundary, PetscInt num_comp_u) { 63 MPI_Comm comm; 64 PetscInt dim; 65 PetscFE fe; 66 IS face_set_is; // Index Set for Face Sets 67 const char *name = "Face Sets"; // PETSc internal requirement 68 PetscInt num_face_sets; // Number of FaceSets in face_set_is 69 const PetscInt *face_set_ids; // id of each FaceSet 70 71 PetscFunctionBeginUser; 72 73 // Setup DM 74 PetscCall(DMGetDimension(dm, &dim)); 75 PetscCall(PetscObjectGetComm((PetscObject)dm, &comm)); 76 PetscCall(PetscFECreateLagrange(comm, dim, num_comp_u, PETSC_FALSE, order, order, &fe)); 77 PetscCall(DMSetFromOptions(dm)); 78 PetscCall(DMAddField(dm, NULL, (PetscObject)fe)); 79 PetscCall(DMCreateDS(dm)); 80 { 81 /* create FE field for coordinates */ 82 PetscFE fe_coords; 83 PetscInt num_comp_coord; 84 PetscCall(DMGetCoordinateDim(dm, &num_comp_coord)); 85 PetscCall(PetscFECreateLagrange(comm, dim, num_comp_coord, PETSC_FALSE, 1, 1, &fe_coords)); 86 PetscCall(DMProjectCoordinates(dm, fe_coords)); 87 PetscCall(PetscFEDestroy(&fe_coords)); 88 } 89 90 // Add Dirichlet (Essential) boundary 91 if (boundary) { 92 if (app_ctx->forcing_choice == FORCE_MMS) { 93 if (app_ctx->test_mode) { 94 // -- Test mode - box mesh 95 PetscBool has_label; 96 PetscInt marker_ids[1] = {1}; 97 PetscCall(DMHasLabel(dm, "marker", &has_label)); 98 if (!has_label) { 99 PetscCall(CreateBCLabel(dm, "marker")); 100 } 101 DMLabel label; 102 PetscCall(DMGetLabel(dm, "marker", &label)); 103 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, "mms", label, 1, marker_ids, 0, 0, NULL, (void (*)(void))BCMMS, NULL, NULL, NULL)); 104 } else { 105 // -- ExodusII mesh with MMS 106 PetscCall(DMGetLabelIdIS(dm, name, &face_set_is)); 107 PetscCall(ISGetSize(face_set_is, &num_face_sets)); 108 PetscCall(ISGetIndices(face_set_is, &face_set_ids)); 109 DMLabel label; 110 PetscCall(DMGetLabel(dm, "Face Sets", &label)); 111 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, "mms", label, num_face_sets, face_set_ids, 0, 0, NULL, (void (*)(void))BCMMS, NULL, NULL, NULL)); 112 PetscCall(ISRestoreIndices(face_set_is, &face_set_ids)); 113 PetscCall(ISDestroy(&face_set_is)); 114 } 115 } else { 116 // -- Mesh with user specified BCs 117 DMLabel label; 118 PetscCall(DMGetLabel(dm, "Face Sets", &label)); 119 // -- Clamp BCs 120 for (PetscInt i = 0; i < app_ctx->bc_clamp_count; i++) { 121 char bcName[25]; 122 snprintf(bcName, sizeof bcName, "clamp_%" PetscInt_FMT, app_ctx->bc_clamp_faces[i]); 123 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, bcName, label, 1, &app_ctx->bc_clamp_faces[i], 0, 0, NULL, (void (*)(void))BCClamp, NULL, 124 (void *)&app_ctx->bc_clamp_max[i], NULL)); 125 } 126 } 127 } 128 PetscCall(DMPlexSetClosurePermutationTensor(dm, PETSC_DETERMINE, NULL)); 129 130 // Cleanup 131 PetscCall(PetscFEDestroy(&fe)); 132 133 PetscFunctionReturn(0); 134 }; 135