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 /// Utility functions for setting up problems using the Newtonian Qfunction 19 20 #include "../navierstokes.h" 21 #include "../qfunctions/setupgeo.h" 22 #include "../qfunctions/newtonian.h" 23 24 PetscErrorCode NS_NEWTONIAN_IG(ProblemData *problem, DM dm, void *setup_ctx, 25 void *ctx) { 26 SetupContext setup_context = *(SetupContext *)setup_ctx; 27 User user = *(User *)ctx; 28 StabilizationType stab; 29 MPI_Comm comm = PETSC_COMM_WORLD; 30 PetscBool implicit; 31 PetscBool has_curr_time = PETSC_FALSE; 32 PetscInt ierr; 33 PetscFunctionBeginUser; 34 35 ierr = PetscCalloc1(1, &user->phys->newtonian_ig_ctx); CHKERRQ(ierr); 36 37 // ------------------------------------------------------ 38 // Setup Generic Newtonian IG Problem 39 // ------------------------------------------------------ 40 problem->dim = 3; 41 problem->q_data_size_vol = 10; 42 problem->q_data_size_sur = 4; 43 problem->setup_vol = Setup; 44 problem->setup_vol_loc = Setup_loc; 45 problem->ics = ICsNewtonianIG; 46 problem->ics_loc = ICsNewtonianIG_loc; 47 problem->setup_sur = SetupBoundary; 48 problem->setup_sur_loc = SetupBoundary_loc; 49 problem->apply_vol_rhs = Newtonian; 50 problem->apply_vol_rhs_loc = Newtonian_loc; 51 problem->apply_vol_ifunction = IFunction_Newtonian; 52 problem->apply_vol_ifunction_loc = IFunction_Newtonian_loc; 53 problem->setup_ctx = SetupContext_DENSITY_CURRENT; 54 problem->non_zero_time = PETSC_FALSE; 55 problem->print_info = PRINT_DENSITY_CURRENT; 56 57 // ------------------------------------------------------ 58 // Create the libCEED context 59 // ------------------------------------------------------ 60 CeedScalar theta0 = 300.; // K 61 CeedScalar thetaC = -15.; // K 62 CeedScalar P0 = 1.e5; // Pa 63 CeedScalar N = 0.01; // 1/s 64 CeedScalar cv = 717.; // J/(kg K) 65 CeedScalar cp = 1004.; // J/(kg K) 66 CeedScalar g = 9.81; // m/s^2 67 CeedScalar lambda = -2./3.; // - 68 CeedScalar mu = 75.; // Pa s, dynamic viscosity 69 // mu = 75 is not physical for air, but is good for numerical stability 70 CeedScalar k = 0.02638; // W/(m K) 71 CeedScalar c_tau = 0.5; // - 72 // c_tau = 0.5 is reported as "optimal" in Hughes et al 2010 73 PetscReal domain_min[3], domain_max[3], domain_size[3]; 74 ierr = DMGetBoundingBox(dm, domain_min, domain_max); CHKERRQ(ierr); 75 for (int i=0; i<3; i++) domain_size[i] = domain_max[i] - domain_min[i]; 76 77 // ------------------------------------------------------ 78 // Create the PETSc context 79 // ------------------------------------------------------ 80 PetscScalar meter = 1e-2; // 1 meter in scaled length units 81 PetscScalar kilogram = 1e-6; // 1 kilogram in scaled mass units 82 PetscScalar second = 1e-2; // 1 second in scaled time units 83 PetscScalar Kelvin = 1; // 1 Kelvin in scaled temperature units 84 PetscScalar W_per_m_K, Pascal, J_per_kg_K, m_per_squared_s; 85 86 // ------------------------------------------------------ 87 // Command line Options 88 // ------------------------------------------------------ 89 ierr = PetscOptionsBegin(comm, NULL, 90 "Options for Newtonian Ideal Gas based problem", 91 NULL); CHKERRQ(ierr); 92 // -- Physics 93 ierr = PetscOptionsScalar("-theta0", "Reference potential temperature", 94 NULL, theta0, &theta0, NULL); CHKERRQ(ierr); 95 ierr = PetscOptionsScalar("-thetaC", "Perturbation of potential temperature", 96 NULL, thetaC, &thetaC, NULL); CHKERRQ(ierr); 97 ierr = PetscOptionsScalar("-P0", "Atmospheric pressure", 98 NULL, P0, &P0, NULL); CHKERRQ(ierr); 99 ierr = PetscOptionsScalar("-N", "Brunt-Vaisala frequency", 100 NULL, N, &N, NULL); CHKERRQ(ierr); 101 ierr = PetscOptionsScalar("-cv", "Heat capacity at constant volume", 102 NULL, cv, &cv, NULL); CHKERRQ(ierr); 103 ierr = PetscOptionsScalar("-cp", "Heat capacity at constant pressure", 104 NULL, cp, &cp, NULL); CHKERRQ(ierr); 105 ierr = PetscOptionsScalar("-g", "Gravitational acceleration", 106 NULL, g, &g, NULL); CHKERRQ(ierr); 107 ierr = PetscOptionsScalar("-lambda", 108 "Stokes hypothesis second viscosity coefficient", 109 NULL, lambda, &lambda, NULL); CHKERRQ(ierr); 110 ierr = PetscOptionsScalar("-mu", "Shear dynamic viscosity coefficient", 111 NULL, mu, &mu, NULL); CHKERRQ(ierr); 112 ierr = PetscOptionsScalar("-k", "Thermal conductivity", 113 NULL, k, &k, NULL); CHKERRQ(ierr); 114 115 ierr = PetscOptionsEnum("-stab", "Stabilization method", NULL, 116 StabilizationTypes, (PetscEnum)(stab = STAB_NONE), 117 (PetscEnum *)&stab, NULL); CHKERRQ(ierr); 118 ierr = PetscOptionsScalar("-c_tau", "Stabilization constant", 119 NULL, c_tau, &c_tau, NULL); CHKERRQ(ierr); 120 ierr = PetscOptionsBool("-implicit", "Use implicit (IFunction) formulation", 121 NULL, implicit=PETSC_FALSE, &implicit, NULL); 122 CHKERRQ(ierr); 123 124 // -- Units 125 ierr = PetscOptionsScalar("-units_meter", "1 meter in scaled length units", 126 NULL, meter, &meter, NULL); CHKERRQ(ierr); 127 meter = fabs(meter); 128 ierr = PetscOptionsScalar("-units_kilogram","1 kilogram in scaled mass units", 129 NULL, kilogram, &kilogram, NULL); CHKERRQ(ierr); 130 kilogram = fabs(kilogram); 131 ierr = PetscOptionsScalar("-units_second","1 second in scaled time units", 132 NULL, second, &second, NULL); CHKERRQ(ierr); 133 second = fabs(second); 134 ierr = PetscOptionsScalar("-units_Kelvin", 135 "1 Kelvin in scaled temperature units", 136 NULL, Kelvin, &Kelvin, NULL); CHKERRQ(ierr); 137 Kelvin = fabs(Kelvin); 138 139 // -- Warnings 140 if (stab == STAB_SUPG && !implicit) { 141 ierr = PetscPrintf(comm, 142 "Warning! Use -stab supg only with -implicit\n"); 143 CHKERRQ(ierr); 144 } 145 ierr = PetscOptionsEnd(); CHKERRQ(ierr); 146 147 // ------------------------------------------------------ 148 // Set up the PETSc context 149 // ------------------------------------------------------ 150 // -- Define derived units 151 Pascal = kilogram / (meter * PetscSqr(second)); 152 J_per_kg_K = PetscSqr(meter) / (PetscSqr(second) * Kelvin); 153 m_per_squared_s = meter / PetscSqr(second); 154 W_per_m_K = kilogram * meter / (pow(second,3) * Kelvin); 155 156 user->units->meter = meter; 157 user->units->kilogram = kilogram; 158 user->units->second = second; 159 user->units->Kelvin = Kelvin; 160 user->units->Pascal = Pascal; 161 user->units->J_per_kg_K = J_per_kg_K; 162 user->units->m_per_squared_s = m_per_squared_s; 163 user->units->W_per_m_K = W_per_m_K; 164 165 // ------------------------------------------------------ 166 // Set up the libCEED context 167 // ------------------------------------------------------ 168 // -- Scale variables to desired units 169 theta0 *= Kelvin; 170 thetaC *= Kelvin; 171 P0 *= Pascal; 172 N *= (1./second); 173 cv *= J_per_kg_K; 174 cp *= J_per_kg_K; 175 g *= m_per_squared_s; 176 mu *= Pascal * second; 177 k *= W_per_m_K; 178 for (int i=0; i<3; i++) domain_size[i] *= meter; 179 problem->dm_scale = meter; 180 181 // -- Setup Context 182 setup_context->theta0 = theta0; 183 setup_context->thetaC = thetaC; 184 setup_context->P0 = P0; 185 setup_context->N = N; 186 setup_context->cv = cv; 187 setup_context->cp = cp; 188 setup_context->g = g; 189 setup_context->lx = domain_size[0]; 190 setup_context->ly = domain_size[1]; 191 setup_context->lz = domain_size[2]; 192 setup_context->time = 0; 193 194 // -- Solver Settings 195 user->phys->stab = stab; 196 user->phys->implicit = implicit; 197 user->phys->has_curr_time = has_curr_time; 198 199 // -- QFunction Context 200 user->phys->newtonian_ig_ctx->lambda = lambda; 201 user->phys->newtonian_ig_ctx->mu = mu; 202 user->phys->newtonian_ig_ctx->k = k; 203 user->phys->newtonian_ig_ctx->cv = cv; 204 user->phys->newtonian_ig_ctx->cp = cp; 205 user->phys->newtonian_ig_ctx->g = g; 206 user->phys->newtonian_ig_ctx->c_tau = c_tau; 207 user->phys->newtonian_ig_ctx->stabilization = stab; 208 209 PetscFunctionReturn(0); 210 } 211 212 PetscErrorCode SetupContext_NEWTONIAN_IG(Ceed ceed, CeedData ceed_data, 213 AppCtx app_ctx, SetupContext setup_ctx, Physics phys) { 214 PetscFunctionBeginUser; 215 CeedQFunctionContextCreate(ceed, &ceed_data->setup_context); 216 CeedQFunctionContextSetData(ceed_data->setup_context, CEED_MEM_HOST, 217 CEED_USE_POINTER, sizeof(*setup_ctx), setup_ctx); 218 CeedQFunctionSetContext(ceed_data->qf_ics, ceed_data->setup_context); 219 CeedQFunctionContextCreate(ceed, &ceed_data->newt_ig_context); 220 CeedQFunctionContextSetData(ceed_data->newt_ig_context, CEED_MEM_HOST, 221 CEED_USE_POINTER, 222 sizeof(*phys->newtonian_ig_ctx), phys->newtonian_ig_ctx); 223 if (ceed_data->qf_rhs_vol) 224 CeedQFunctionSetContext(ceed_data->qf_rhs_vol, ceed_data->newt_ig_context); 225 if (ceed_data->qf_ifunction_vol) 226 CeedQFunctionSetContext(ceed_data->qf_ifunction_vol, 227 ceed_data->newt_ig_context); 228 PetscFunctionReturn(0); 229 } 230