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 problems using the Newtonian Qfunction 10 11 #include "../navierstokes.h" 12 #include "../qfunctions/setupgeo.h" 13 #include "../qfunctions/newtonian.h" 14 15 // Compute relative error |a - b|/|s| 16 static PetscErrorCode CheckPrimitiveWithTolerance(StatePrimitive sY, 17 StatePrimitive aY, StatePrimitive bY, const char *name, PetscReal rtol_pressure, 18 PetscReal rtol_velocity, PetscReal rtol_temperature) { 19 20 PetscFunctionBeginUser; 21 StatePrimitive eY; // relative error 22 eY.pressure = (aY.pressure - bY.pressure) / sY.pressure; 23 PetscScalar u = sqrt(Square(sY.velocity[0]) + Square(sY.velocity[1]) + Square( 24 sY.velocity[2])); 25 for (int j=0; j<3; j++) eY.velocity[j] = (aY.velocity[j] - bY.velocity[j]) / u; 26 eY.temperature = (aY.temperature - bY.temperature) / sY.temperature; 27 if (fabs(eY.pressure) > rtol_pressure) 28 printf("%s: pressure error %g\n", name, eY.pressure); 29 for (int j=0; j<3; j++) 30 if (fabs(eY.velocity[j]) > rtol_velocity) 31 printf("%s: velocity[%d] error %g\n", name, j, eY.velocity[j]); 32 if (fabs(eY.temperature) > rtol_temperature) 33 printf("%s: temperature error %g\n", name, eY.temperature); 34 PetscFunctionReturn(0); 35 } 36 37 static PetscErrorCode UnitTests_Newtonian(User user, 38 NewtonianIdealGasContext gas) { 39 40 Units units = user->units; 41 const CeedScalar eps = 1e-6; 42 const CeedScalar kg = units->kilogram, m = units->meter, sec = units->second, 43 Pascal = units->Pascal; 44 45 PetscFunctionBeginUser; 46 const CeedScalar rho = 1.2 * kg / (m*m*m), u = 40 * m/sec; 47 CeedScalar U[5] = {rho, rho*u, rho *u*1.1, rho *u*1.2, 250e3*Pascal + .5*rho *u*u}; 48 const CeedScalar x[3] = {.1, .2, .3}; 49 State s = StateFromU(gas, U, x); 50 for (int i=0; i<8; i++) { 51 CeedScalar dU[5] = {0}, dx[3] = {0}; 52 if (i < 5) dU[i] = U[i]; 53 else dx[i-5] = x[i-5]; 54 State ds = StateFromU_fwd(gas, s, dU, x, dx); 55 for (int j=0; j<5; j++) dU[j] = (1 + eps * (i == j)) * U[j]; 56 for (int j=0; j<3; j++) dx[j] = (1 + eps * (i == 5 + j)) * x[j]; 57 State t = StateFromU(gas, dU, dx); 58 StatePrimitive dY; 59 dY.pressure = (t.Y.pressure - s.Y.pressure) / eps; 60 for (int j=0; j<3; j++) 61 dY.velocity[j] = (t.Y.velocity[j] - s.Y.velocity[j]) / eps; 62 dY.temperature = (t.Y.temperature - s.Y.temperature) / eps; 63 char buf[128]; 64 snprintf(buf, sizeof buf, "StateFromU_fwd i=%d", i); 65 PetscCall(CheckPrimitiveWithTolerance(dY, ds.Y, dY, buf, 5e-6, 1e-6, 1e-6)); 66 } 67 PetscFunctionReturn(0); 68 } 69 70 PetscErrorCode NS_NEWTONIAN_IG(ProblemData *problem, DM dm, void *ctx) { 71 72 SetupContext setup_context; 73 User user = *(User *)ctx; 74 StabilizationType stab; 75 MPI_Comm comm = PETSC_COMM_WORLD; 76 PetscBool implicit; 77 PetscBool has_curr_time = PETSC_FALSE, unit_tests; 78 PetscInt ierr; 79 NewtonianIdealGasContext newtonian_ig_ctx; 80 CeedQFunctionContext newtonian_ig_context; 81 82 PetscFunctionBeginUser; 83 ierr = PetscCalloc1(1, &setup_context); CHKERRQ(ierr); 84 ierr = PetscCalloc1(1, &newtonian_ig_ctx); CHKERRQ(ierr); 85 86 // ------------------------------------------------------ 87 // Setup Generic Newtonian IG Problem 88 // ------------------------------------------------------ 89 problem->dim = 3; 90 problem->q_data_size_vol = 10; 91 problem->q_data_size_sur = 10; 92 problem->jac_data_size_sur = 5; 93 problem->setup_vol.qfunction = Setup; 94 problem->setup_vol.qfunction_loc = Setup_loc; 95 problem->ics.qfunction = ICsNewtonianIG; 96 problem->ics.qfunction_loc = ICsNewtonianIG_loc; 97 problem->setup_sur.qfunction = SetupBoundary; 98 problem->setup_sur.qfunction_loc = SetupBoundary_loc; 99 problem->apply_vol_rhs.qfunction = RHSFunction_Newtonian; 100 problem->apply_vol_rhs.qfunction_loc = RHSFunction_Newtonian_loc; 101 problem->apply_vol_ifunction.qfunction = IFunction_Newtonian; 102 problem->apply_vol_ifunction.qfunction_loc = IFunction_Newtonian_loc; 103 problem->apply_vol_ijacobian.qfunction = IJacobian_Newtonian; 104 problem->apply_vol_ijacobian.qfunction_loc = IJacobian_Newtonian_loc; 105 problem->bc = NULL; 106 problem->bc_ctx = setup_context; 107 problem->non_zero_time = PETSC_FALSE; 108 problem->print_info = PRINT_DENSITY_CURRENT; 109 110 // ------------------------------------------------------ 111 // Create the libCEED context 112 // ------------------------------------------------------ 113 CeedScalar cv = 717.; // J/(kg K) 114 CeedScalar cp = 1004.; // J/(kg K) 115 CeedScalar g[3] = {0, 0, -9.81}; // m/s^2 116 CeedScalar lambda = -2./3.; // - 117 CeedScalar mu = 1.8e-5; // Pa s, dynamic viscosity 118 CeedScalar k = 0.02638; // W/(m K) 119 CeedScalar c_tau = 0.5; // - 120 CeedScalar Ctau_t = 1.0; // - 121 CeedScalar Ctau_v = 36.0; // TODO make function of degree 122 CeedScalar Ctau_C = 1.0; // TODO make function of degree 123 CeedScalar Ctau_M = 1.0; // TODO make function of degree 124 CeedScalar Ctau_E = 1.0; // TODO make function of degree 125 PetscReal domain_min[3], domain_max[3], domain_size[3]; 126 ierr = DMGetBoundingBox(dm, domain_min, domain_max); CHKERRQ(ierr); 127 for (PetscInt i=0; i<3; i++) domain_size[i] = domain_max[i] - domain_min[i]; 128 129 // ------------------------------------------------------ 130 // Create the PETSc context 131 // ------------------------------------------------------ 132 PetscScalar meter = 1; // 1 meter in scaled length units 133 PetscScalar kilogram = 1; // 1 kilogram in scaled mass units 134 PetscScalar second = 1; // 1 second in scaled time units 135 PetscScalar Kelvin = 1; // 1 Kelvin in scaled temperature units 136 PetscScalar W_per_m_K, Pascal, J_per_kg_K, m_per_squared_s; 137 138 // ------------------------------------------------------ 139 // Command line Options 140 // ------------------------------------------------------ 141 PetscOptionsBegin(comm, NULL, "Options for Newtonian Ideal Gas based problem", 142 NULL); 143 144 // -- Physics 145 ierr = PetscOptionsScalar("-cv", "Heat capacity at constant volume", 146 NULL, cv, &cv, NULL); CHKERRQ(ierr); 147 ierr = PetscOptionsScalar("-cp", "Heat capacity at constant pressure", 148 NULL, cp, &cp, NULL); CHKERRQ(ierr); 149 ierr = PetscOptionsScalar("-lambda", 150 "Stokes hypothesis second viscosity coefficient", 151 NULL, lambda, &lambda, NULL); CHKERRQ(ierr); 152 ierr = PetscOptionsScalar("-mu", "Shear dynamic viscosity coefficient", 153 NULL, mu, &mu, NULL); CHKERRQ(ierr); 154 ierr = PetscOptionsScalar("-k", "Thermal conductivity", 155 NULL, k, &k, NULL); CHKERRQ(ierr); 156 157 PetscInt dim = problem->dim; 158 ierr = PetscOptionsRealArray("-g", "Gravitational acceleration", 159 NULL, g, &dim, NULL); CHKERRQ(ierr); 160 ierr = PetscOptionsEnum("-stab", "Stabilization method", NULL, 161 StabilizationTypes, (PetscEnum)(stab = STAB_NONE), 162 (PetscEnum *)&stab, NULL); CHKERRQ(ierr); 163 ierr = PetscOptionsScalar("-c_tau", "Stabilization constant", 164 NULL, c_tau, &c_tau, NULL); CHKERRQ(ierr); 165 ierr = PetscOptionsScalar("-Ctau_t", "Stabilization time constant", 166 NULL, Ctau_t, &Ctau_t, NULL); CHKERRQ(ierr); 167 ierr = PetscOptionsScalar("-Ctau_v", "Stabilization viscous constant", 168 NULL, Ctau_v, &Ctau_v, NULL); CHKERRQ(ierr); 169 ierr = PetscOptionsScalar("-Ctau_C", "Stabilization continuity constant", 170 NULL, Ctau_C, &Ctau_C, NULL); CHKERRQ(ierr); 171 ierr = PetscOptionsScalar("-Ctau_M", "Stabilization momentum constant", 172 NULL, Ctau_M, &Ctau_M, NULL); CHKERRQ(ierr); 173 ierr = PetscOptionsScalar("-Ctau_E", "Stabilization energy constant", 174 NULL, Ctau_E, &Ctau_E, NULL); CHKERRQ(ierr); 175 ierr = PetscOptionsBool("-implicit", "Use implicit (IFunction) formulation", 176 NULL, implicit=PETSC_FALSE, &implicit, NULL); 177 CHKERRQ(ierr); 178 ierr = PetscOptionsBool("-newtonian_unit_tests", "Run Newtonian unit tests", 179 NULL, unit_tests=PETSC_FALSE, &unit_tests, NULL); 180 CHKERRQ(ierr); 181 182 // -- Units 183 ierr = PetscOptionsScalar("-units_meter", "1 meter in scaled length units", 184 NULL, meter, &meter, NULL); CHKERRQ(ierr); 185 meter = fabs(meter); 186 ierr = PetscOptionsScalar("-units_kilogram","1 kilogram in scaled mass units", 187 NULL, kilogram, &kilogram, NULL); CHKERRQ(ierr); 188 kilogram = fabs(kilogram); 189 ierr = PetscOptionsScalar("-units_second","1 second in scaled time units", 190 NULL, second, &second, NULL); CHKERRQ(ierr); 191 second = fabs(second); 192 ierr = PetscOptionsScalar("-units_Kelvin", 193 "1 Kelvin in scaled temperature units", 194 NULL, Kelvin, &Kelvin, NULL); CHKERRQ(ierr); 195 Kelvin = fabs(Kelvin); 196 197 // -- Warnings 198 if (stab == STAB_SUPG && !implicit) { 199 ierr = PetscPrintf(comm, 200 "Warning! Use -stab supg only with -implicit\n"); 201 CHKERRQ(ierr); 202 } 203 PetscOptionsEnd(); 204 205 // ------------------------------------------------------ 206 // Set up the PETSc context 207 // ------------------------------------------------------ 208 // -- Define derived units 209 Pascal = kilogram / (meter * PetscSqr(second)); 210 J_per_kg_K = PetscSqr(meter) / (PetscSqr(second) * Kelvin); 211 m_per_squared_s = meter / PetscSqr(second); 212 W_per_m_K = kilogram * meter / (pow(second,3) * Kelvin); 213 214 user->units->meter = meter; 215 user->units->kilogram = kilogram; 216 user->units->second = second; 217 user->units->Kelvin = Kelvin; 218 user->units->Pascal = Pascal; 219 user->units->J_per_kg_K = J_per_kg_K; 220 user->units->m_per_squared_s = m_per_squared_s; 221 user->units->W_per_m_K = W_per_m_K; 222 223 // ------------------------------------------------------ 224 // Set up the libCEED context 225 // ------------------------------------------------------ 226 // -- Scale variables to desired units 227 cv *= J_per_kg_K; 228 cp *= J_per_kg_K; 229 mu *= Pascal * second; 230 k *= W_per_m_K; 231 for (PetscInt i=0; i<3; i++) domain_size[i] *= meter; 232 for (PetscInt i=0; i<3; i++) g[i] *= m_per_squared_s; 233 problem->dm_scale = meter; 234 235 // -- Setup Context 236 setup_context->cv = cv; 237 setup_context->cp = cp; 238 setup_context->lx = domain_size[0]; 239 setup_context->ly = domain_size[1]; 240 setup_context->lz = domain_size[2]; 241 setup_context->time = 0; 242 ierr = PetscArraycpy(setup_context->g, g, 3); CHKERRQ(ierr); 243 244 // -- Solver Settings 245 user->phys->stab = stab; 246 user->phys->implicit = implicit; 247 user->phys->has_curr_time = has_curr_time; 248 249 // -- QFunction Context 250 newtonian_ig_ctx->lambda = lambda; 251 newtonian_ig_ctx->mu = mu; 252 newtonian_ig_ctx->k = k; 253 newtonian_ig_ctx->cv = cv; 254 newtonian_ig_ctx->cp = cp; 255 newtonian_ig_ctx->c_tau = c_tau; 256 newtonian_ig_ctx->Ctau_t = Ctau_t; 257 newtonian_ig_ctx->Ctau_v = Ctau_v; 258 newtonian_ig_ctx->Ctau_C = Ctau_C; 259 newtonian_ig_ctx->Ctau_M = Ctau_M; 260 newtonian_ig_ctx->Ctau_E = Ctau_E; 261 newtonian_ig_ctx->stabilization = stab; 262 ierr = PetscArraycpy(newtonian_ig_ctx->g, g, 3); CHKERRQ(ierr); 263 264 CeedQFunctionContextCreate(user->ceed, &problem->ics.qfunction_context); 265 CeedQFunctionContextSetData(problem->ics.qfunction_context, CEED_MEM_HOST, 266 CEED_USE_POINTER, sizeof(*setup_context), setup_context); 267 CeedQFunctionContextRegisterDouble(problem->ics.qfunction_context, 268 "evaluation time", 269 (char *)&setup_context->time - (char *)setup_context, 1, "Time of evaluation"); 270 271 CeedQFunctionContextCreate(user->ceed, &newtonian_ig_context); 272 CeedQFunctionContextSetData(newtonian_ig_context, CEED_MEM_HOST, 273 CEED_USE_POINTER, 274 sizeof(*newtonian_ig_ctx), newtonian_ig_ctx); 275 CeedQFunctionContextSetDataDestroy(newtonian_ig_context, CEED_MEM_HOST, 276 FreeContextPetsc); 277 CeedQFunctionContextRegisterDouble(newtonian_ig_context, "timestep size", 278 offsetof(struct NewtonianIdealGasContext_, dt), 1, "Size of timestep, delta t"); 279 CeedQFunctionContextRegisterDouble(newtonian_ig_context, "ijacobian time shift", 280 offsetof(struct NewtonianIdealGasContext_, ijacobian_time_shift), 1, 281 "Shift for mass matrix in IJacobian"); 282 problem->apply_vol_rhs.qfunction_context = newtonian_ig_context; 283 CeedQFunctionContextReferenceCopy(newtonian_ig_context, 284 &problem->apply_vol_ifunction.qfunction_context); 285 CeedQFunctionContextReferenceCopy(newtonian_ig_context, 286 &problem->apply_vol_ijacobian.qfunction_context); 287 288 if (unit_tests) { 289 PetscCall(UnitTests_Newtonian(user, newtonian_ig_ctx)); 290 } 291 PetscFunctionReturn(0); 292 } 293 294 PetscErrorCode PRINT_DENSITY_CURRENT(ProblemData *problem, 295 AppCtx app_ctx) { 296 MPI_Comm comm = PETSC_COMM_WORLD; 297 PetscErrorCode ierr; 298 NewtonianIdealGasContext newtonian_ctx; 299 300 PetscFunctionBeginUser; 301 CeedQFunctionContextGetData(problem->apply_vol_rhs.qfunction_context, 302 CEED_MEM_HOST, &newtonian_ctx); 303 ierr = PetscPrintf(comm, 304 " Problem:\n" 305 " Problem Name : %s\n" 306 " Stabilization : %s\n", 307 app_ctx->problem_name, StabilizationTypes[newtonian_ctx->stabilization]); 308 CHKERRQ(ierr); 309 CeedQFunctionContextRestoreData(problem->apply_vol_rhs.qfunction_context, 310 &newtonian_ctx); 311 PetscFunctionReturn(0); 312 } 313