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 /// Utility functions for setting up SHOCKTUBE 10 11 #include "../qfunctions/shocktube.h" 12 13 #include "../navierstokes.h" 14 #include "../qfunctions/setupgeo.h" 15 16 PetscErrorCode NS_SHOCKTUBE(ProblemData *problem, DM dm, void *ctx, SimpleBC bc) { 17 SetupContextShock setup_context; 18 User user = *(User *)ctx; 19 MPI_Comm comm = PETSC_COMM_WORLD; 20 PetscBool implicit; 21 PetscBool yzb; 22 PetscInt stab; 23 PetscBool has_curr_time = PETSC_FALSE; 24 ShockTubeContext shocktube_ctx; 25 CeedQFunctionContext shocktube_context; 26 27 PetscFunctionBeginUser; 28 PetscCall(PetscCalloc1(1, &setup_context)); 29 PetscCall(PetscCalloc1(1, &shocktube_ctx)); 30 31 // ------------------------------------------------------ 32 // SET UP SHOCKTUBE 33 // ------------------------------------------------------ 34 problem->dim = 3; 35 problem->q_data_size_vol = 10; 36 problem->q_data_size_sur = 4; 37 problem->setup_vol.qfunction = Setup; 38 problem->setup_vol.qfunction_loc = Setup_loc; 39 problem->setup_sur.qfunction = SetupBoundary; 40 problem->setup_sur.qfunction_loc = SetupBoundary_loc; 41 problem->ics.qfunction = ICsShockTube; 42 problem->ics.qfunction_loc = ICsShockTube_loc; 43 problem->apply_vol_rhs.qfunction = EulerShockTube; 44 problem->apply_vol_rhs.qfunction_loc = EulerShockTube_loc; 45 problem->apply_vol_ifunction.qfunction = NULL; 46 problem->apply_vol_ifunction.qfunction_loc = NULL; 47 problem->bc = Exact_ShockTube; 48 problem->bc_ctx = setup_context; 49 problem->non_zero_time = PETSC_FALSE; 50 problem->print_info = PRINT_SHOCKTUBE; 51 52 // ------------------------------------------------------ 53 // Create the libCEED context 54 // ------------------------------------------------------ 55 // Driver section initial conditions 56 CeedScalar P_high = 1.0; // Pa 57 CeedScalar rho_high = 1.0; // kg/m^3 58 // Driven section initial conditions 59 CeedScalar P_low = 0.1; // Pa 60 CeedScalar rho_low = 0.125; // kg/m^3 61 // Stabilization parameter 62 CeedScalar c_tau = 0.5; // -, based on Hughes et al (2010) 63 // Tuning parameters for the YZB shock capturing 64 CeedScalar Cyzb = 0.1; // -, used in approximation of (Na),x 65 CeedScalar Byzb = 2.0; // -, 1 for smooth shocks 66 // 2 for sharp shocks 67 PetscReal domain_min[3], domain_max[3], domain_size[3]; 68 PetscCall(DMGetBoundingBox(dm, domain_min, domain_max)); 69 for (PetscInt i = 0; i < 3; i++) domain_size[i] = domain_max[i] - domain_min[i]; 70 71 // ------------------------------------------------------ 72 // Create the PETSc context 73 // ------------------------------------------------------ 74 PetscScalar meter = 1e-2; // 1 meter in scaled length units 75 PetscScalar second = 1e-2; // 1 second in scaled time units 76 77 // ------------------------------------------------------ 78 // Command line Options 79 // ------------------------------------------------------ 80 PetscOptionsBegin(comm, NULL, "Options for SHOCKTUBE problem", NULL); 81 82 // -- Numerical formulation options 83 PetscCall(PetscOptionsBool("-implicit", "Use implicit (IFunction) formulation", NULL, implicit = PETSC_FALSE, &implicit, NULL)); 84 PetscCall(PetscOptionsEnum("-stab", "Stabilization method", NULL, StabilizationTypes, (PetscEnum)(stab = STAB_NONE), (PetscEnum *)&stab, NULL)); 85 PetscCall(PetscOptionsScalar("-c_tau", "Stabilization constant", NULL, c_tau, &c_tau, NULL)); 86 PetscCall(PetscOptionsBool("-yzb", "Use YZB discontinuity capturing", NULL, yzb = PETSC_FALSE, &yzb, NULL)); 87 88 // -- Units 89 PetscCall(PetscOptionsScalar("-units_meter", "1 meter in scaled length units", NULL, meter, &meter, NULL)); 90 meter = fabs(meter); 91 PetscCall(PetscOptionsScalar("-units_second", "1 second in scaled time units", NULL, second, &second, NULL)); 92 second = fabs(second); 93 94 // -- Warnings 95 if (stab == STAB_SUPG) { 96 PetscCall(PetscPrintf(comm, "Warning! -stab supg not implemented for the shocktube problem. \n")); 97 } 98 if (yzb && implicit) { 99 PetscCall(PetscPrintf(comm, "Warning! -yzb only implemented for explicit timestepping. \n")); 100 } 101 102 PetscOptionsEnd(); 103 104 // ------------------------------------------------------ 105 // Set up the PETSc context 106 // ------------------------------------------------------ 107 user->units->meter = meter; 108 user->units->second = second; 109 110 // ------------------------------------------------------ 111 // Set up the libCEED context 112 // ------------------------------------------------------ 113 // -- Scale variables to desired units 114 for (PetscInt i = 0; i < 3; i++) { 115 domain_size[i] *= meter; 116 domain_min[i] *= meter; 117 } 118 problem->dm_scale = meter; 119 CeedScalar mid_point = 0.5 * (domain_size[0] + domain_min[0]); 120 121 // -- Setup Context 122 setup_context->mid_point = mid_point; 123 setup_context->time = 0.0; 124 setup_context->P_high = P_high; 125 setup_context->rho_high = rho_high; 126 setup_context->P_low = P_low; 127 setup_context->rho_low = rho_low; 128 129 // -- QFunction Context 130 user->phys->implicit = implicit; 131 user->phys->has_curr_time = has_curr_time; 132 shocktube_ctx->implicit = implicit; 133 shocktube_ctx->stabilization = stab; 134 shocktube_ctx->yzb = yzb; 135 shocktube_ctx->Cyzb = Cyzb; 136 shocktube_ctx->Byzb = Byzb; 137 shocktube_ctx->c_tau = c_tau; 138 139 CeedQFunctionContextCreate(user->ceed, &problem->ics.qfunction_context); 140 CeedQFunctionContextSetData(problem->ics.qfunction_context, CEED_MEM_HOST, CEED_USE_POINTER, sizeof(*setup_context), setup_context); 141 CeedQFunctionContextSetDataDestroy(problem->ics.qfunction_context, CEED_MEM_HOST, FreeContextPetsc); 142 143 CeedQFunctionContextCreate(user->ceed, &shocktube_context); 144 CeedQFunctionContextSetData(shocktube_context, CEED_MEM_HOST, CEED_USE_POINTER, sizeof(*shocktube_ctx), shocktube_ctx); 145 CeedQFunctionContextSetDataDestroy(shocktube_context, CEED_MEM_HOST, FreeContextPetsc); 146 problem->apply_vol_rhs.qfunction_context = shocktube_context; 147 PetscFunctionReturn(0); 148 } 149 150 PetscErrorCode PRINT_SHOCKTUBE(ProblemData *problem, AppCtx app_ctx) { 151 MPI_Comm comm = PETSC_COMM_WORLD; 152 PetscFunctionBeginUser; 153 154 PetscCall(PetscPrintf(comm, 155 " Problem:\n" 156 " Problem Name : %s\n", 157 app_ctx->problem_name)); 158 159 PetscFunctionReturn(0); 160 } 161