1 // Copyright (c) 2017-2024, 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 problems using the Newtonian Qfunction 10 11 #include "../qfunctions/newtonian.h" 12 13 #include <ceed.h> 14 #include <petscdm.h> 15 16 #include "../navierstokes.h" 17 18 // For use with PetscOptionsEnum 19 static const char *const StateVariables[] = {"CONSERVATIVE", "PRIMITIVE", "ENTROPY", "StateVariable", "STATEVAR_", NULL}; 20 21 static PetscErrorCode CheckQWithTolerance(const CeedScalar Q_s[5], const CeedScalar Q_a[5], const CeedScalar Q_b[5], const char *name, 22 PetscReal rtol_0, PetscReal rtol_u, PetscReal rtol_4) { 23 CeedScalar relative_error[5]; // relative error 24 CeedScalar divisor_threshold = 10 * CEED_EPSILON; 25 26 PetscFunctionBeginUser; 27 relative_error[0] = (Q_a[0] - Q_b[0]) / (fabs(Q_s[0]) > divisor_threshold ? Q_s[0] : 1); 28 relative_error[4] = (Q_a[4] - Q_b[4]) / (fabs(Q_s[4]) > divisor_threshold ? Q_s[4] : 1); 29 30 CeedScalar u_magnitude = sqrt(Square(Q_s[1]) + Square(Q_s[2]) + Square(Q_s[3])); 31 CeedScalar u_divisor = u_magnitude > divisor_threshold ? u_magnitude : 1; 32 for (int i = 1; i < 4; i++) { 33 relative_error[i] = (Q_a[i] - Q_b[i]) / u_divisor; 34 } 35 36 if (fabs(relative_error[0]) >= rtol_0) { 37 printf("%s[0] error %g (expected %.10e, got %.10e)\n", name, relative_error[0], Q_s[0], Q_a[0]); 38 } 39 for (int i = 1; i < 4; i++) { 40 if (fabs(relative_error[i]) >= rtol_u) { 41 printf("%s[%d] error %g (expected %.10e, got %.10e)\n", name, i, relative_error[i], Q_s[i], Q_a[i]); 42 } 43 } 44 if (fabs(relative_error[4]) >= rtol_4) { 45 printf("%s[4] error %g (expected %.10e, got %.10e)\n", name, relative_error[4], Q_s[4], Q_a[4]); 46 } 47 PetscFunctionReturn(PETSC_SUCCESS); 48 } 49 50 // @brief Verify `StateFromQ` by converting A0 -> B0 -> A0_test, where A0 should equal A0_test 51 static PetscErrorCode TestState(StateVariable state_var_A, StateVariable state_var_B, NewtonianIdealGasContext gas, const CeedScalar A0[5], 52 CeedScalar rtol_0, CeedScalar rtol_u, CeedScalar rtol_4) { 53 CeedScalar B0[5], A0_test[5]; 54 char buf[128]; 55 const char *const StateVariables_Initial[] = {"U", "Y", "V"}; 56 57 PetscFunctionBeginUser; 58 const char *A_initial = StateVariables_Initial[state_var_A]; 59 const char *B_initial = StateVariables_Initial[state_var_B]; 60 61 State state_A0 = StateFromQ(gas, A0, state_var_A); 62 StateToQ(gas, state_A0, B0, state_var_B); 63 State state_B0 = StateFromQ(gas, B0, state_var_B); 64 StateToQ(gas, state_B0, A0_test, state_var_A); 65 66 snprintf(buf, sizeof buf, "%s->%s->%s: %s", A_initial, B_initial, A_initial, A_initial); 67 PetscCall(CheckQWithTolerance(A0, A0_test, A0, buf, rtol_0, rtol_u, rtol_4)); 68 PetscFunctionReturn(PETSC_SUCCESS); 69 } 70 71 // @brief Verify `StateFromQ_fwd` via a finite difference approximation 72 static PetscErrorCode TestState_fwd(StateVariable state_var_A, StateVariable state_var_B, NewtonianIdealGasContext gas, const CeedScalar A0[5], 73 CeedScalar rtol_0, CeedScalar rtol_u, CeedScalar rtol_4) { 74 CeedScalar eps = 4e-7; // Finite difference step 75 char buf[128]; 76 const char *const StateVariables_Initial[] = {"U", "Y", "V"}; 77 78 PetscFunctionBeginUser; 79 const char *A_initial = StateVariables_Initial[state_var_A]; 80 const char *B_initial = StateVariables_Initial[state_var_B]; 81 State state_0 = StateFromQ(gas, A0, state_var_A); 82 83 for (int i = 0; i < 5; i++) { 84 CeedScalar dB[5] = {0.}, dB_fd[5] = {0.}; 85 { // Calculate dB using State functions 86 CeedScalar dA[5] = {0}; 87 88 dA[i] = A0[i]; 89 State dstate_0 = StateFromQ_fwd(gas, state_0, dA, state_var_A); 90 StateToQ_fwd(gas, state_0, dstate_0, dB, state_var_B); 91 } 92 93 { // Calculate dB_fd via finite difference approximation 94 CeedScalar A1[5], B0[5], B1[5]; 95 96 for (int j = 0; j < 5; j++) A1[j] = (1 + eps * (i == j)) * A0[j]; 97 State state_1 = StateFromQ(gas, A1, state_var_A); 98 StateToQ(gas, state_0, B0, state_var_B); 99 StateToQ(gas, state_1, B1, state_var_B); 100 for (int j = 0; j < 5; j++) dB_fd[j] = (B1[j] - B0[j]) / eps; 101 } 102 103 snprintf(buf, sizeof buf, "d%s->d%s: StateFrom%s_fwd i=%d: d%s", A_initial, B_initial, A_initial, i, B_initial); 104 PetscCall(CheckQWithTolerance(dB_fd, dB, dB_fd, buf, rtol_0, rtol_u, rtol_4)); 105 } 106 PetscFunctionReturn(PETSC_SUCCESS); 107 } 108 109 // @brief Test the Newtonian State transformation functions, `StateFrom*` 110 static PetscErrorCode UnitTests_Newtonian(User user, NewtonianIdealGasContext gas) { 111 Units units = user->units; 112 const CeedScalar kg = units->kilogram, m = units->meter, sec = units->second, K = units->Kelvin; 113 114 PetscFunctionBeginUser; 115 const CeedScalar T = 200 * K; 116 const CeedScalar rho = 1.2 * kg / Cube(m); 117 const CeedScalar P = (HeatCapacityRatio(gas) - 1) * rho * gas->cv * T; 118 const CeedScalar u_base = 40 * m / sec; 119 const CeedScalar u[3] = {u_base, u_base * 1.1, u_base * 1.2}; 120 const CeedScalar e_kinetic = 0.5 * Dot3(u, u); 121 const CeedScalar e_internal = gas->cv * T; 122 const CeedScalar e_total = e_kinetic + e_internal; 123 const CeedScalar gamma = HeatCapacityRatio(gas); 124 const CeedScalar entropy = log(P) - gamma * log(rho); 125 const CeedScalar rho_div_p = rho / P; 126 const CeedScalar Y0[5] = {P, u[0], u[1], u[2], T}; 127 const CeedScalar U0[5] = {rho, rho * u[0], rho * u[1], rho * u[2], rho * e_total}; 128 const CeedScalar V0[5] = {(gamma - entropy) / (gamma - 1) - rho_div_p * (e_kinetic), rho_div_p * u[0], rho_div_p * u[1], rho_div_p * u[2], 129 -rho_div_p}; 130 131 { 132 CeedScalar rtol = 20 * CEED_EPSILON; 133 134 PetscCall(TestState(STATEVAR_PRIMITIVE, STATEVAR_CONSERVATIVE, gas, Y0, rtol, rtol, rtol)); 135 PetscCall(TestState(STATEVAR_PRIMITIVE, STATEVAR_ENTROPY, gas, Y0, rtol, rtol, rtol)); 136 PetscCall(TestState(STATEVAR_CONSERVATIVE, STATEVAR_PRIMITIVE, gas, U0, rtol, rtol, rtol)); 137 PetscCall(TestState(STATEVAR_CONSERVATIVE, STATEVAR_ENTROPY, gas, U0, rtol, rtol, rtol)); 138 PetscCall(TestState(STATEVAR_ENTROPY, STATEVAR_CONSERVATIVE, gas, V0, rtol, rtol, rtol)); 139 PetscCall(TestState(STATEVAR_ENTROPY, STATEVAR_PRIMITIVE, gas, V0, rtol, rtol, rtol)); 140 } 141 142 { 143 CeedScalar rtol = 5e-6; 144 145 PetscCall(TestState_fwd(STATEVAR_PRIMITIVE, STATEVAR_CONSERVATIVE, gas, Y0, rtol, rtol, rtol)); 146 PetscCall(TestState_fwd(STATEVAR_PRIMITIVE, STATEVAR_ENTROPY, gas, Y0, rtol, rtol, rtol)); 147 PetscCall(TestState_fwd(STATEVAR_CONSERVATIVE, STATEVAR_PRIMITIVE, gas, U0, rtol, rtol, rtol)); 148 PetscCall(TestState_fwd(STATEVAR_CONSERVATIVE, STATEVAR_ENTROPY, gas, U0, 10 * rtol, rtol, rtol)); 149 PetscCall(TestState_fwd(STATEVAR_ENTROPY, STATEVAR_CONSERVATIVE, gas, V0, 5 * rtol, rtol, rtol)); 150 PetscCall(TestState_fwd(STATEVAR_ENTROPY, STATEVAR_PRIMITIVE, gas, V0, 5 * rtol, 5 * rtol, 5 * rtol)); 151 } 152 PetscFunctionReturn(PETSC_SUCCESS); 153 } 154 155 // @brief Create CeedOperator for stabilized mass KSP for explicit timestepping 156 // 157 // Only used for SUPG stabilization 158 PetscErrorCode CreateKSPMassOperator_NewtonianStabilized(User user, CeedOperator *op_mass) { 159 Ceed ceed = user->ceed; 160 CeedInt num_comp_q, q_data_size; 161 CeedQFunction qf_mass; 162 CeedElemRestriction elem_restr_q, elem_restr_qd_i; 163 CeedBasis basis_q; 164 CeedVector q_data; 165 CeedQFunctionContext qf_ctx = NULL; 166 PetscInt dim = 3; 167 168 PetscFunctionBeginUser; 169 { // Get restriction and basis from the RHS function 170 CeedOperator *sub_ops; 171 CeedOperatorField field; 172 PetscInt sub_op_index = 0; // will be 0 for the volume op 173 174 PetscCallCeed(ceed, CeedCompositeOperatorGetSubList(user->op_rhs_ctx->op, &sub_ops)); 175 PetscCallCeed(ceed, CeedOperatorGetFieldByName(sub_ops[sub_op_index], "q", &field)); 176 PetscCallCeed(ceed, CeedOperatorFieldGetElemRestriction(field, &elem_restr_q)); 177 PetscCallCeed(ceed, CeedOperatorFieldGetBasis(field, &basis_q)); 178 179 PetscCallCeed(ceed, CeedOperatorGetFieldByName(sub_ops[sub_op_index], "qdata", &field)); 180 PetscCallCeed(ceed, CeedOperatorFieldGetElemRestriction(field, &elem_restr_qd_i)); 181 PetscCallCeed(ceed, CeedOperatorFieldGetVector(field, &q_data)); 182 183 PetscCallCeed(ceed, CeedOperatorGetContext(sub_ops[sub_op_index], &qf_ctx)); 184 } 185 186 PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(elem_restr_q, &num_comp_q)); 187 PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(elem_restr_qd_i, &q_data_size)); 188 189 PetscCallCeed(ceed, CeedQFunctionCreateInterior(ceed, 1, MassFunction_Newtonian_Conserv, MassFunction_Newtonian_Conserv_loc, &qf_mass)); 190 191 PetscCallCeed(ceed, CeedQFunctionSetContext(qf_mass, qf_ctx)); 192 PetscCallCeed(ceed, CeedQFunctionSetUserFlopsEstimate(qf_mass, 0)); 193 PetscCallCeed(ceed, CeedQFunctionAddInput(qf_mass, "q_dot", 5, CEED_EVAL_INTERP)); 194 PetscCallCeed(ceed, CeedQFunctionAddInput(qf_mass, "q", 5, CEED_EVAL_INTERP)); 195 PetscCallCeed(ceed, CeedQFunctionAddInput(qf_mass, "qdata", q_data_size, CEED_EVAL_NONE)); 196 PetscCallCeed(ceed, CeedQFunctionAddOutput(qf_mass, "v", 5, CEED_EVAL_INTERP)); 197 PetscCallCeed(ceed, CeedQFunctionAddOutput(qf_mass, "Grad_v", 5 * dim, CEED_EVAL_GRAD)); 198 199 PetscCallCeed(ceed, CeedOperatorCreate(ceed, qf_mass, NULL, NULL, op_mass)); 200 PetscCallCeed(ceed, CeedOperatorSetField(*op_mass, "q_dot", elem_restr_q, basis_q, CEED_VECTOR_ACTIVE)); 201 PetscCallCeed(ceed, CeedOperatorSetField(*op_mass, "q", elem_restr_q, basis_q, user->q_ceed)); 202 PetscCallCeed(ceed, CeedOperatorSetField(*op_mass, "qdata", elem_restr_qd_i, CEED_BASIS_NONE, q_data)); 203 PetscCallCeed(ceed, CeedOperatorSetField(*op_mass, "v", elem_restr_q, basis_q, CEED_VECTOR_ACTIVE)); 204 PetscCallCeed(ceed, CeedOperatorSetField(*op_mass, "Grad_v", elem_restr_q, basis_q, CEED_VECTOR_ACTIVE)); 205 206 PetscCallCeed(ceed, CeedQFunctionDestroy(&qf_mass)); 207 PetscFunctionReturn(PETSC_SUCCESS); 208 } 209 210 PetscErrorCode NS_NEWTONIAN_IG(ProblemData problem, DM dm, void *ctx, SimpleBC bc) { 211 SetupContext setup_context; 212 User user = *(User *)ctx; 213 CeedInt degree = user->app_ctx->degree; 214 StabilizationType stab; 215 StateVariable state_var; 216 MPI_Comm comm = user->comm; 217 Ceed ceed = user->ceed; 218 PetscBool implicit; 219 PetscBool unit_tests; 220 NewtonianIdealGasContext newtonian_ig_ctx; 221 CeedQFunctionContext newtonian_ig_context; 222 223 PetscFunctionBeginUser; 224 PetscCall(PetscCalloc1(1, &setup_context)); 225 PetscCall(PetscCalloc1(1, &newtonian_ig_ctx)); 226 227 // ------------------------------------------------------ 228 // Setup Generic Newtonian IG Problem 229 // ------------------------------------------------------ 230 problem->dim = 3; 231 problem->jac_data_size_sur = 11; 232 problem->compute_exact_solution_error = PETSC_FALSE; 233 problem->print_info = PRINT_NEWTONIAN; 234 problem->uses_newtonian = PETSC_TRUE; 235 236 // ------------------------------------------------------ 237 // Create the libCEED context 238 // ------------------------------------------------------ 239 CeedScalar cv = 717.; // J/(kg K) 240 CeedScalar cp = 1004.; // J/(kg K) 241 CeedScalar g[3] = {0, 0, 0}; // m/s^2 242 CeedScalar lambda = -2. / 3.; // - 243 CeedScalar mu = 1.8e-5; // Pa s, dynamic viscosity 244 CeedScalar k = 0.02638; // W/(m K) 245 CeedScalar c_tau = 0.5 / degree; // - 246 CeedScalar Ctau_t = 1.0; // - 247 CeedScalar Cv_func[3] = {36, 60, 128}; 248 CeedScalar Ctau_v = Cv_func[(CeedInt)Min(3, degree) - 1]; 249 CeedScalar Ctau_C = 0.25 / degree; 250 CeedScalar Ctau_M = 0.25 / degree; 251 CeedScalar Ctau_E = 0.125; 252 PetscReal domain_min[3], domain_max[3], domain_size[3]; 253 PetscCall(DMGetBoundingBox(dm, domain_min, domain_max)); 254 for (PetscInt i = 0; i < 3; i++) domain_size[i] = domain_max[i] - domain_min[i]; 255 256 StatePrimitive reference = {.pressure = 1.01e5, .velocity = {0}, .temperature = 288.15}; 257 CeedScalar idl_decay_time = -1, idl_start = 0, idl_length = 0, idl_pressure = reference.pressure; 258 PetscBool idl_enable = PETSC_FALSE; 259 260 // ------------------------------------------------------ 261 // Create the PETSc context 262 // ------------------------------------------------------ 263 PetscScalar meter = 1; // 1 meter in scaled length units 264 PetscScalar kilogram = 1; // 1 kilogram in scaled mass units 265 PetscScalar second = 1; // 1 second in scaled time units 266 PetscScalar Kelvin = 1; // 1 Kelvin in scaled temperature units 267 PetscScalar W_per_m_K, Pascal, J_per_kg_K, m_per_squared_s; 268 269 // ------------------------------------------------------ 270 // Command line Options 271 // ------------------------------------------------------ 272 PetscBool given_option = PETSC_FALSE; 273 PetscOptionsBegin(comm, NULL, "Options for Newtonian Ideal Gas based problem", NULL); 274 // -- Conservative vs Primitive variables 275 PetscCall(PetscOptionsEnum("-state_var", "State variables used", NULL, StateVariables, (PetscEnum)(state_var = STATEVAR_CONSERVATIVE), 276 (PetscEnum *)&state_var, NULL)); 277 278 switch (state_var) { 279 case STATEVAR_CONSERVATIVE: 280 problem->ics.qfunction = ICsNewtonianIG_Conserv; 281 problem->ics.qfunction_loc = ICsNewtonianIG_Conserv_loc; 282 problem->apply_vol_rhs.qfunction = RHSFunction_Newtonian; 283 problem->apply_vol_rhs.qfunction_loc = RHSFunction_Newtonian_loc; 284 problem->apply_vol_ifunction.qfunction = IFunction_Newtonian_Conserv; 285 problem->apply_vol_ifunction.qfunction_loc = IFunction_Newtonian_Conserv_loc; 286 problem->apply_vol_ijacobian.qfunction = IJacobian_Newtonian_Conserv; 287 problem->apply_vol_ijacobian.qfunction_loc = IJacobian_Newtonian_Conserv_loc; 288 problem->apply_inflow.qfunction = BoundaryIntegral_Conserv; 289 problem->apply_inflow.qfunction_loc = BoundaryIntegral_Conserv_loc; 290 problem->apply_inflow_jacobian.qfunction = BoundaryIntegral_Jacobian_Conserv; 291 problem->apply_inflow_jacobian.qfunction_loc = BoundaryIntegral_Jacobian_Conserv_loc; 292 break; 293 294 case STATEVAR_PRIMITIVE: 295 problem->ics.qfunction = ICsNewtonianIG_Prim; 296 problem->ics.qfunction_loc = ICsNewtonianIG_Prim_loc; 297 problem->apply_vol_ifunction.qfunction = IFunction_Newtonian_Prim; 298 problem->apply_vol_ifunction.qfunction_loc = IFunction_Newtonian_Prim_loc; 299 problem->apply_vol_ijacobian.qfunction = IJacobian_Newtonian_Prim; 300 problem->apply_vol_ijacobian.qfunction_loc = IJacobian_Newtonian_Prim_loc; 301 problem->apply_inflow.qfunction = BoundaryIntegral_Prim; 302 problem->apply_inflow.qfunction_loc = BoundaryIntegral_Prim_loc; 303 problem->apply_inflow_jacobian.qfunction = BoundaryIntegral_Jacobian_Prim; 304 problem->apply_inflow_jacobian.qfunction_loc = BoundaryIntegral_Jacobian_Prim_loc; 305 break; 306 case STATEVAR_ENTROPY: 307 problem->ics.qfunction = ICsNewtonianIG_Entropy; 308 problem->ics.qfunction_loc = ICsNewtonianIG_Entropy_loc; 309 problem->apply_vol_ifunction.qfunction = IFunction_Newtonian_Entropy; 310 problem->apply_vol_ifunction.qfunction_loc = IFunction_Newtonian_Entropy_loc; 311 problem->apply_vol_ijacobian.qfunction = IJacobian_Newtonian_Entropy; 312 problem->apply_vol_ijacobian.qfunction_loc = IJacobian_Newtonian_Entropy_loc; 313 problem->apply_inflow.qfunction = BoundaryIntegral_Entropy; 314 problem->apply_inflow.qfunction_loc = BoundaryIntegral_Entropy_loc; 315 problem->apply_inflow_jacobian.qfunction = BoundaryIntegral_Jacobian_Entropy; 316 problem->apply_inflow_jacobian.qfunction_loc = BoundaryIntegral_Jacobian_Entropy_loc; 317 break; 318 } 319 320 // -- Physics 321 PetscCall(PetscOptionsScalar("-cv", "Heat capacity at constant volume", NULL, cv, &cv, NULL)); 322 PetscCall(PetscOptionsScalar("-cp", "Heat capacity at constant pressure", NULL, cp, &cp, NULL)); 323 PetscCall(PetscOptionsScalar("-lambda", "Stokes hypothesis second viscosity coefficient", NULL, lambda, &lambda, NULL)); 324 PetscCall(PetscOptionsScalar("-mu", "Shear dynamic viscosity coefficient", NULL, mu, &mu, NULL)); 325 PetscCall(PetscOptionsScalar("-k", "Thermal conductivity", NULL, k, &k, NULL)); 326 327 PetscInt dim = problem->dim; 328 PetscCall(PetscOptionsDeprecated("-g", "-gravity", "libCEED 0.11.1", NULL)); 329 PetscCall(PetscOptionsRealArray("-gravity", "Gravitational acceleration vector", NULL, g, &dim, &given_option)); 330 if (given_option) PetscCheck(dim == 3, comm, PETSC_ERR_ARG_SIZ, "Gravity vector must be size 3, %" PetscInt_FMT " values given", dim); 331 332 PetscCall(PetscOptionsEnum("-stab", "Stabilization method", NULL, StabilizationTypes, (PetscEnum)(stab = STAB_NONE), (PetscEnum *)&stab, NULL)); 333 PetscCall(PetscOptionsScalar("-c_tau", "Stabilization constant", NULL, c_tau, &c_tau, NULL)); 334 PetscCall(PetscOptionsScalar("-Ctau_t", "Stabilization time constant", NULL, Ctau_t, &Ctau_t, NULL)); 335 PetscCall(PetscOptionsScalar("-Ctau_v", "Stabilization viscous constant", NULL, Ctau_v, &Ctau_v, NULL)); 336 PetscCall(PetscOptionsScalar("-Ctau_C", "Stabilization continuity constant", NULL, Ctau_C, &Ctau_C, NULL)); 337 PetscCall(PetscOptionsScalar("-Ctau_M", "Stabilization momentum constant", NULL, Ctau_M, &Ctau_M, NULL)); 338 PetscCall(PetscOptionsScalar("-Ctau_E", "Stabilization energy constant", NULL, Ctau_E, &Ctau_E, NULL)); 339 PetscCall(PetscOptionsBool("-implicit", "Use implicit (IFunction) formulation", NULL, implicit = PETSC_FALSE, &implicit, NULL)); 340 PetscCall(PetscOptionsBool("-newtonian_unit_tests", "Run Newtonian unit tests", NULL, unit_tests = PETSC_FALSE, &unit_tests, NULL)); 341 342 dim = 3; 343 PetscCall(PetscOptionsScalar("-reference_pressure", "Reference/initial pressure", NULL, reference.pressure, &reference.pressure, NULL)); 344 PetscCall(PetscOptionsScalarArray("-reference_velocity", "Reference/initial velocity", NULL, reference.velocity, &dim, NULL)); 345 PetscCall(PetscOptionsScalar("-reference_temperature", "Reference/initial temperature", NULL, reference.temperature, &reference.temperature, NULL)); 346 347 // -- Units 348 PetscCall(PetscOptionsScalar("-units_meter", "1 meter in scaled length units", NULL, meter, &meter, NULL)); 349 meter = fabs(meter); 350 PetscCall(PetscOptionsScalar("-units_kilogram", "1 kilogram in scaled mass units", NULL, kilogram, &kilogram, NULL)); 351 kilogram = fabs(kilogram); 352 PetscCall(PetscOptionsScalar("-units_second", "1 second in scaled time units", NULL, second, &second, NULL)); 353 second = fabs(second); 354 PetscCall(PetscOptionsScalar("-units_Kelvin", "1 Kelvin in scaled temperature units", NULL, Kelvin, &Kelvin, NULL)); 355 Kelvin = fabs(Kelvin); 356 357 // -- Warnings 358 PetscCheck(!(state_var == STATEVAR_PRIMITIVE && !implicit), comm, PETSC_ERR_SUP, 359 "RHSFunction is not provided for primitive variables (use -state_var primitive only with -implicit)\n"); 360 361 PetscCall(PetscOptionsScalar("-idl_decay_time", "Characteristic timescale of the pressure deviance decay. The timestep is good starting point", 362 NULL, idl_decay_time, &idl_decay_time, &idl_enable)); 363 PetscCheck(!(idl_enable && idl_decay_time == 0), comm, PETSC_ERR_SUP, "idl_decay_time may not be equal to zero."); 364 if (idl_decay_time < 0) idl_enable = PETSC_FALSE; 365 PetscCall(PetscOptionsScalar("-idl_start", "Start of IDL in the x direction", NULL, idl_start, &idl_start, NULL)); 366 PetscCall(PetscOptionsScalar("-idl_length", "Length of IDL in the positive x direction", NULL, idl_length, &idl_length, NULL)); 367 idl_pressure = reference.pressure; 368 PetscCall(PetscOptionsScalar("-idl_pressure", "Pressure IDL uses as reference (default is `-reference_pressure`)", NULL, idl_pressure, 369 &idl_pressure, NULL)); 370 PetscOptionsEnd(); 371 372 if (stab == STAB_SUPG && !implicit) problem->create_mass_operator = CreateKSPMassOperator_NewtonianStabilized; 373 374 // ------------------------------------------------------ 375 // Set up the PETSc context 376 // ------------------------------------------------------ 377 // -- Define derived units 378 Pascal = kilogram / (meter * PetscSqr(second)); 379 J_per_kg_K = PetscSqr(meter) / (PetscSqr(second) * Kelvin); 380 m_per_squared_s = meter / PetscSqr(second); 381 W_per_m_K = kilogram * meter / (pow(second, 3) * Kelvin); 382 383 user->units->meter = meter; 384 user->units->kilogram = kilogram; 385 user->units->second = second; 386 user->units->Kelvin = Kelvin; 387 user->units->Pascal = Pascal; 388 user->units->J_per_kg_K = J_per_kg_K; 389 user->units->m_per_squared_s = m_per_squared_s; 390 user->units->W_per_m_K = W_per_m_K; 391 392 // ------------------------------------------------------ 393 // Set up the libCEED context 394 // ------------------------------------------------------ 395 // -- Scale variables to desired units 396 cv *= J_per_kg_K; 397 cp *= J_per_kg_K; 398 mu *= Pascal * second; 399 k *= W_per_m_K; 400 for (PetscInt i = 0; i < 3; i++) domain_size[i] *= meter; 401 for (PetscInt i = 0; i < 3; i++) g[i] *= m_per_squared_s; 402 reference.pressure *= Pascal; 403 for (PetscInt i = 0; i < 3; i++) reference.velocity[i] *= meter / second; 404 reference.temperature *= Kelvin; 405 problem->dm_scale = meter; 406 407 // -- Solver Settings 408 user->phys->implicit = implicit; 409 user->phys->state_var = state_var; 410 411 // -- QFunction Context 412 newtonian_ig_ctx->lambda = lambda; 413 newtonian_ig_ctx->mu = mu; 414 newtonian_ig_ctx->k = k; 415 newtonian_ig_ctx->cv = cv; 416 newtonian_ig_ctx->cp = cp; 417 newtonian_ig_ctx->c_tau = c_tau; 418 newtonian_ig_ctx->Ctau_t = Ctau_t; 419 newtonian_ig_ctx->Ctau_v = Ctau_v; 420 newtonian_ig_ctx->Ctau_C = Ctau_C; 421 newtonian_ig_ctx->Ctau_M = Ctau_M; 422 newtonian_ig_ctx->Ctau_E = Ctau_E; 423 newtonian_ig_ctx->stabilization = stab; 424 newtonian_ig_ctx->is_implicit = implicit; 425 newtonian_ig_ctx->state_var = state_var; 426 newtonian_ig_ctx->idl_enable = idl_enable; 427 newtonian_ig_ctx->idl_amplitude = 1 / (idl_decay_time * second); 428 newtonian_ig_ctx->idl_start = idl_start * meter; 429 newtonian_ig_ctx->idl_length = idl_length * meter; 430 newtonian_ig_ctx->idl_pressure = idl_pressure; 431 PetscCall(PetscArraycpy(newtonian_ig_ctx->g, g, 3)); 432 433 // -- Setup Context 434 setup_context->reference = reference; 435 setup_context->gas = *newtonian_ig_ctx; 436 setup_context->lx = domain_size[0]; 437 setup_context->ly = domain_size[1]; 438 setup_context->lz = domain_size[2]; 439 setup_context->time = 0; 440 441 PetscCallCeed(ceed, CeedQFunctionContextCreate(user->ceed, &problem->ics.qfunction_context)); 442 PetscCallCeed(ceed, 443 CeedQFunctionContextSetData(problem->ics.qfunction_context, CEED_MEM_HOST, CEED_USE_POINTER, sizeof(*setup_context), setup_context)); 444 PetscCallCeed(ceed, CeedQFunctionContextSetDataDestroy(problem->ics.qfunction_context, CEED_MEM_HOST, FreeContextPetsc)); 445 PetscCallCeed(ceed, CeedQFunctionContextRegisterDouble(problem->ics.qfunction_context, "evaluation time", offsetof(struct SetupContext_, time), 1, 446 "Time of evaluation")); 447 448 PetscCallCeed(ceed, CeedQFunctionContextCreate(user->ceed, &newtonian_ig_context)); 449 PetscCallCeed(ceed, 450 CeedQFunctionContextSetData(newtonian_ig_context, CEED_MEM_HOST, CEED_USE_POINTER, sizeof(*newtonian_ig_ctx), newtonian_ig_ctx)); 451 PetscCallCeed(ceed, CeedQFunctionContextSetDataDestroy(newtonian_ig_context, CEED_MEM_HOST, FreeContextPetsc)); 452 PetscCallCeed(ceed, CeedQFunctionContextRegisterDouble(newtonian_ig_context, "timestep size", offsetof(struct NewtonianIdealGasContext_, dt), 1, 453 "Size of timestep, delta t")); 454 PetscCallCeed(ceed, CeedQFunctionContextRegisterDouble(newtonian_ig_context, "ijacobian time shift", 455 offsetof(struct NewtonianIdealGasContext_, ijacobian_time_shift), 1, 456 "Shift for mass matrix in IJacobian")); 457 PetscCallCeed(ceed, CeedQFunctionContextRegisterDouble(newtonian_ig_context, "solution time", offsetof(struct NewtonianIdealGasContext_, time), 1, 458 "Current solution time")); 459 460 problem->apply_vol_rhs.qfunction_context = newtonian_ig_context; 461 PetscCallCeed(ceed, CeedQFunctionContextReferenceCopy(newtonian_ig_context, &problem->apply_vol_ifunction.qfunction_context)); 462 PetscCallCeed(ceed, CeedQFunctionContextReferenceCopy(newtonian_ig_context, &problem->apply_vol_ijacobian.qfunction_context)); 463 PetscCallCeed(ceed, CeedQFunctionContextReferenceCopy(newtonian_ig_context, &problem->apply_inflow.qfunction_context)); 464 PetscCallCeed(ceed, CeedQFunctionContextReferenceCopy(newtonian_ig_context, &problem->apply_inflow_jacobian.qfunction_context)); 465 466 if (bc->num_freestream > 0) PetscCall(FreestreamBCSetup(problem, dm, ctx, newtonian_ig_ctx, &reference)); 467 if (bc->num_outflow > 0) PetscCall(OutflowBCSetup(problem, dm, ctx, newtonian_ig_ctx, &reference)); 468 if (bc->num_slip > 0) PetscCall(SlipBCSetup(problem, dm, ctx, newtonian_ig_context)); 469 470 if (unit_tests) { 471 PetscCall(UnitTests_Newtonian(user, newtonian_ig_ctx)); 472 } 473 PetscFunctionReturn(PETSC_SUCCESS); 474 } 475 476 PetscErrorCode PRINT_NEWTONIAN(User user, ProblemData problem, AppCtx app_ctx) { 477 MPI_Comm comm = user->comm; 478 Ceed ceed = user->ceed; 479 NewtonianIdealGasContext newtonian_ctx; 480 481 PetscFunctionBeginUser; 482 PetscCallCeed(ceed, CeedQFunctionContextGetData(problem->apply_vol_rhs.qfunction_context, CEED_MEM_HOST, &newtonian_ctx)); 483 PetscCall(PetscPrintf(comm, 484 " Problem:\n" 485 " Problem Name : %s\n" 486 " Stabilization : %s\n", 487 app_ctx->problem_name, StabilizationTypes[newtonian_ctx->stabilization])); 488 PetscCallCeed(ceed, CeedQFunctionContextRestoreData(problem->apply_vol_rhs.qfunction_context, &newtonian_ctx)); 489 PetscFunctionReturn(PETSC_SUCCESS); 490 } 491