1 // Copyright (c) 2017, Lawrence Livermore National Security, LLC. Produced at 2 // the Lawrence Livermore National Laboratory. LLNL-CODE-734707. All Rights 3 // reserved. See files LICENSE and NOTICE for details. 4 // 5 // This file is part of CEED, a collection of benchmarks, miniapps, software 6 // libraries and APIs for efficient high-order finite element and spectral 7 // element discretizations for exascale applications. For more information and 8 // source code availability see http://github.com/ceed. 9 // 10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC, 11 // a collaborative effort of two U.S. Department of Energy organizations (Office 12 // of Science and the National Nuclear Security Administration) responsible for 13 // the planning and preparation of a capable exascale ecosystem, including 14 // software, applications, hardware, advanced system engineering and early 15 // testbed platforms, in support of the nation's exascale computing imperative. 16 17 /// @file 18 /// Setup DM for Navier-Stokes example using PETSc 19 20 #include "../navierstokes.h" 21 22 // Create mesh 23 PetscErrorCode CreateDM(MPI_Comm comm, ProblemData *problem, DM *dm) { 24 PetscErrorCode ierr; 25 PetscFunctionBeginUser; 26 // Create DMPLEX 27 ierr = DMCreate(comm, dm); CHKERRQ(ierr); 28 ierr = DMSetType(*dm, DMPLEX); CHKERRQ(ierr); 29 // Set Tensor elements 30 ierr = PetscOptionsSetValue(NULL, "-dm_plex_simplex", "0"); CHKERRQ(ierr); 31 // Set CL options 32 ierr = DMSetFromOptions(*dm); CHKERRQ(ierr); 33 ierr = DMViewFromOptions(*dm, NULL, "-dm_view"); CHKERRQ(ierr); 34 PetscFunctionReturn(0); 35 } 36 37 // Setup DM 38 PetscErrorCode SetUpDM(DM dm, ProblemData *problem, PetscInt degree, 39 SimpleBC bc, Physics phys, void *setup_ctx) { 40 PetscErrorCode ierr; 41 PetscFunctionBeginUser; 42 { 43 // Configure the finite element space and boundary conditions 44 PetscFE fe; 45 PetscInt num_comp_q = 5; 46 DMLabel label; 47 ierr = PetscFECreateLagrange(PETSC_COMM_SELF, problem->dim, num_comp_q, 48 PETSC_FALSE, degree, PETSC_DECIDE, 49 &fe); CHKERRQ(ierr); 50 ierr = PetscObjectSetName((PetscObject)fe, "Q"); CHKERRQ(ierr); 51 ierr = DMAddField(dm, NULL,(PetscObject)fe); CHKERRQ(ierr); 52 ierr = DMCreateDS(dm); CHKERRQ(ierr); 53 { 54 /* create FE field for coordinates */ 55 PetscFE fe_coords; 56 PetscInt num_comp_coord; 57 ierr = DMGetCoordinateDim(dm, &num_comp_coord); CHKERRQ(ierr); 58 ierr = PetscFECreateLagrange(PETSC_COMM_SELF, problem->dim, num_comp_coord, 59 PETSC_FALSE, 1, 1, &fe_coords); CHKERRQ(ierr); 60 ierr = DMProjectCoordinates(dm, fe_coords); CHKERRQ(ierr); 61 ierr = PetscFEDestroy(&fe_coords); CHKERRQ(ierr); 62 } 63 ierr = DMGetLabel(dm, "Face Sets", &label); CHKERRQ(ierr); 64 // Set wall BCs 65 if (bc->num_wall > 0) { 66 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "wall", label, 67 bc->num_wall, bc->walls, 0, bc->num_comps, 68 bc->wall_comps, (void(*)(void))problem->bc, 69 NULL, setup_ctx, NULL); CHKERRQ(ierr); 70 } 71 // Set slip BCs in the x direction 72 if (bc->num_slip[0] > 0) { 73 PetscInt comps[1] = {1}; 74 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipx", label, 75 bc->num_slip[0], bc->slips[0], 0, 1, comps, 76 (void(*)(void))NULL, NULL, setup_ctx, NULL); CHKERRQ(ierr); 77 } 78 // Set slip BCs in the y direction 79 if (bc->num_slip[1] > 0) { 80 PetscInt comps[1] = {2}; 81 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipy", label, 82 bc->num_slip[1], bc->slips[1], 0, 1, comps, 83 (void(*)(void))NULL, NULL, setup_ctx, NULL); CHKERRQ(ierr); 84 } 85 // Set slip BCs in the z direction 86 if (bc->num_slip[2] > 0) { 87 PetscInt comps[1] = {3}; 88 ierr = DMAddBoundary(dm, DM_BC_ESSENTIAL, "slipz", label, 89 bc->num_slip[2], bc->slips[2], 0, 1, comps, 90 (void(*)(void))NULL, NULL, setup_ctx, NULL); CHKERRQ(ierr); 91 } 92 ierr = DMPlexSetClosurePermutationTensor(dm, PETSC_DETERMINE, NULL); 93 CHKERRQ(ierr); 94 ierr = PetscFEDestroy(&fe); CHKERRQ(ierr); 95 } 96 { 97 // Empty name for conserved field (because there is only one field) 98 PetscSection section; 99 ierr = DMGetLocalSection(dm, §ion); CHKERRQ(ierr); 100 ierr = PetscSectionSetFieldName(section, 0, ""); CHKERRQ(ierr); 101 ierr = PetscSectionSetComponentName(section, 0, 0, "Density"); 102 CHKERRQ(ierr); 103 ierr = PetscSectionSetComponentName(section, 0, 1, "Momentum X"); 104 CHKERRQ(ierr); 105 ierr = PetscSectionSetComponentName(section, 0, 2, "Momentum Y"); 106 CHKERRQ(ierr); 107 ierr = PetscSectionSetComponentName(section, 0, 3, "Momentum Z"); 108 CHKERRQ(ierr); 109 ierr = PetscSectionSetComponentName(section, 0, 4, "Energy Density"); 110 CHKERRQ(ierr); 111 } 112 PetscFunctionReturn(0); 113 } 114 115 // Refine DM for high-order viz 116 PetscErrorCode VizRefineDM(DM dm, User user, ProblemData *problem, 117 SimpleBC bc, Physics phys, void *setup_ctx) { 118 PetscErrorCode ierr; 119 DM dm_hierarchy[user->app_ctx->viz_refine + 1]; 120 VecType vec_type; 121 PetscFunctionBeginUser; 122 123 ierr = DMPlexSetRefinementUniform(dm, PETSC_TRUE); CHKERRQ(ierr); 124 125 dm_hierarchy[0] = dm; 126 for (PetscInt i = 0, d = user->app_ctx->degree; 127 i < user->app_ctx->viz_refine; i++) { 128 Mat interp_next; 129 ierr = DMRefine(dm_hierarchy[i], MPI_COMM_NULL, &dm_hierarchy[i+1]); 130 CHKERRQ(ierr); 131 ierr = DMClearDS(dm_hierarchy[i+1]); CHKERRQ(ierr); 132 ierr = DMClearFields(dm_hierarchy[i+1]); CHKERRQ(ierr); 133 ierr = DMSetCoarseDM(dm_hierarchy[i+1], dm_hierarchy[i]); CHKERRQ(ierr); 134 d = (d + 1) / 2; 135 if (i + 1 == user->app_ctx->viz_refine) d = 1; 136 ierr = DMGetVecType(dm, &vec_type); CHKERRQ(ierr); 137 ierr = DMSetVecType(dm_hierarchy[i+1], vec_type); CHKERRQ(ierr); 138 ierr = SetUpDM(dm_hierarchy[i+1], problem, d, bc, phys, setup_ctx); 139 CHKERRQ(ierr); 140 ierr = DMCreateInterpolation(dm_hierarchy[i], dm_hierarchy[i+1], &interp_next, 141 NULL); CHKERRQ(ierr); 142 if (!i) user->interp_viz = interp_next; 143 else { 144 Mat C; 145 ierr = MatMatMult(interp_next, user->interp_viz, MAT_INITIAL_MATRIX, 146 PETSC_DECIDE, &C); CHKERRQ(ierr); 147 ierr = MatDestroy(&interp_next); CHKERRQ(ierr); 148 ierr = MatDestroy(&user->interp_viz); CHKERRQ(ierr); 149 user->interp_viz = C; 150 } 151 } 152 for (PetscInt i=1; i<user->app_ctx->viz_refine; i++) { 153 ierr = DMDestroy(&dm_hierarchy[i]); CHKERRQ(ierr); 154 } 155 user->dm_viz = dm_hierarchy[user->app_ctx->viz_refine]; 156 157 PetscFunctionReturn(0); 158 } 159