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