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 /// Setup DM for Navier-Stokes example using PETSc 10 11 #include "../navierstokes.h" 12 #include "../problems/stg_shur14.h" 13 14 // Create mesh 15 PetscErrorCode CreateDM(MPI_Comm comm, ProblemData *problem, 16 MatType mat_type, VecType vec_type, 17 DM *dm) { 18 PetscErrorCode ierr; 19 PetscFunctionBeginUser; 20 // Create DMPLEX 21 ierr = DMCreate(comm, dm); CHKERRQ(ierr); 22 ierr = DMSetType(*dm, DMPLEX); CHKERRQ(ierr); 23 ierr = DMSetMatType(*dm, mat_type); CHKERRQ(ierr); 24 ierr = DMSetVecType(*dm, vec_type); CHKERRQ(ierr); 25 26 // Set Tensor elements 27 ierr = PetscOptionsSetValue(NULL, "-dm_plex_simplex", "0"); CHKERRQ(ierr); 28 // Set CL options 29 ierr = DMSetFromOptions(*dm); CHKERRQ(ierr); 30 ierr = DMViewFromOptions(*dm, NULL, "-dm_view"); CHKERRQ(ierr); 31 PetscFunctionReturn(0); 32 } 33 34 // Setup DM 35 PetscErrorCode SetUpDM(DM dm, ProblemData *problem, PetscInt degree, 36 SimpleBC bc, Physics phys) { 37 PetscErrorCode ierr; 38 PetscFunctionBeginUser; 39 { 40 // Configure the finite element space and boundary conditions 41 PetscFE fe; 42 PetscInt num_comp_q = 5; 43 DMLabel label; 44 ierr = PetscFECreateLagrange(PETSC_COMM_SELF, problem->dim, num_comp_q, 45 PETSC_FALSE, degree, PETSC_DECIDE, 46 &fe); CHKERRQ(ierr); 47 ierr = PetscObjectSetName((PetscObject)fe, "Q"); CHKERRQ(ierr); 48 ierr = DMAddField(dm, NULL,(PetscObject)fe); CHKERRQ(ierr); 49 ierr = DMCreateDS(dm); CHKERRQ(ierr); 50 ierr = DMGetLabel(dm, "Face Sets", &label); CHKERRQ(ierr); 51 // Set wall BCs 52 if (bc->num_wall > 0) { 53 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "wall", label, 54 bc->num_wall, bc->walls, 0, bc->num_comps, 55 bc->wall_comps, (void(*)(void))problem->bc, 56 NULL, problem->bc_ctx, NULL); CHKERRQ(ierr); 57 } 58 // Set slip BCs in the x direction 59 if (bc->num_slip[0] > 0) { 60 PetscInt comps[1] = {1}; 61 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipx", label, 62 bc->num_slip[0], bc->slips[0], 0, 1, comps, 63 (void(*)(void))NULL, NULL, problem->bc_ctx, NULL); CHKERRQ(ierr); 64 } 65 // Set slip BCs in the y direction 66 if (bc->num_slip[1] > 0) { 67 PetscInt comps[1] = {2}; 68 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipy", label, 69 bc->num_slip[1], bc->slips[1], 0, 1, comps, 70 (void(*)(void))NULL, NULL, problem->bc_ctx, NULL); CHKERRQ(ierr); 71 } 72 // Set slip BCs in the z direction 73 if (bc->num_slip[2] > 0) { 74 PetscInt comps[1] = {3}; 75 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipz", label, 76 bc->num_slip[2], bc->slips[2], 0, 1, comps, 77 (void(*)(void))NULL, NULL, problem->bc_ctx, NULL); CHKERRQ(ierr); 78 } 79 { 80 PetscBool use_strongstg = PETSC_FALSE; 81 ierr = PetscOptionsGetBool(NULL, NULL, "-stg_strong", &use_strongstg, NULL); 82 CHKERRQ(ierr); 83 84 if (use_strongstg) { 85 ierr = SetupStrongSTG(dm, bc, problem); CHKERRQ(ierr); 86 } 87 } 88 89 ierr = DMPlexSetClosurePermutationTensor(dm, PETSC_DETERMINE, NULL); 90 CHKERRQ(ierr); 91 ierr = PetscFEDestroy(&fe); CHKERRQ(ierr); 92 } 93 { 94 // Empty name for conserved field (because there is only one field) 95 PetscSection section; 96 ierr = DMGetLocalSection(dm, §ion); CHKERRQ(ierr); 97 ierr = PetscSectionSetFieldName(section, 0, ""); CHKERRQ(ierr); 98 ierr = PetscSectionSetComponentName(section, 0, 0, "Density"); 99 CHKERRQ(ierr); 100 ierr = PetscSectionSetComponentName(section, 0, 1, "Momentum X"); 101 CHKERRQ(ierr); 102 ierr = PetscSectionSetComponentName(section, 0, 2, "Momentum Y"); 103 CHKERRQ(ierr); 104 ierr = PetscSectionSetComponentName(section, 0, 3, "Momentum Z"); 105 CHKERRQ(ierr); 106 ierr = PetscSectionSetComponentName(section, 0, 4, "Energy Density"); 107 CHKERRQ(ierr); 108 } 109 PetscFunctionReturn(0); 110 } 111 112 // Refine DM for high-order viz 113 PetscErrorCode VizRefineDM(DM dm, User user, ProblemData *problem, 114 SimpleBC bc, Physics phys) { 115 PetscErrorCode ierr; 116 DM dm_hierarchy[user->app_ctx->viz_refine + 1]; 117 VecType vec_type; 118 PetscFunctionBeginUser; 119 120 ierr = DMPlexSetRefinementUniform(dm, PETSC_TRUE); CHKERRQ(ierr); 121 122 dm_hierarchy[0] = dm; 123 for (PetscInt i = 0, d = user->app_ctx->degree; 124 i < user->app_ctx->viz_refine; i++) { 125 Mat interp_next; 126 ierr = DMRefine(dm_hierarchy[i], MPI_COMM_NULL, &dm_hierarchy[i+1]); 127 CHKERRQ(ierr); 128 ierr = DMClearDS(dm_hierarchy[i+1]); CHKERRQ(ierr); 129 ierr = DMClearFields(dm_hierarchy[i+1]); CHKERRQ(ierr); 130 ierr = DMSetCoarseDM(dm_hierarchy[i+1], dm_hierarchy[i]); CHKERRQ(ierr); 131 d = (d + 1) / 2; 132 if (i + 1 == user->app_ctx->viz_refine) d = 1; 133 ierr = DMGetVecType(dm, &vec_type); CHKERRQ(ierr); 134 ierr = DMSetVecType(dm_hierarchy[i+1], vec_type); CHKERRQ(ierr); 135 ierr = SetUpDM(dm_hierarchy[i+1], problem, d, bc, phys); 136 CHKERRQ(ierr); 137 ierr = DMCreateInterpolation(dm_hierarchy[i], dm_hierarchy[i+1], &interp_next, 138 NULL); CHKERRQ(ierr); 139 if (!i) user->interp_viz = interp_next; 140 else { 141 Mat C; 142 ierr = MatMatMult(interp_next, user->interp_viz, MAT_INITIAL_MATRIX, 143 PETSC_DECIDE, &C); CHKERRQ(ierr); 144 ierr = MatDestroy(&interp_next); CHKERRQ(ierr); 145 ierr = MatDestroy(&user->interp_viz); CHKERRQ(ierr); 146 user->interp_viz = C; 147 } 148 } 149 for (PetscInt i=1; i<user->app_ctx->viz_refine; i++) { 150 ierr = DMDestroy(&dm_hierarchy[i]); CHKERRQ(ierr); 151 } 152 user->dm_viz = dm_hierarchy[user->app_ctx->viz_refine]; 153 154 PetscFunctionReturn(0); 155 } 156