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 Channel flow 10 11 #include "../qfunctions/channel.h" 12 13 #include "../navierstokes.h" 14 15 PetscErrorCode NS_CHANNEL(ProblemData *problem, DM dm, void *ctx, SimpleBC bc) { 16 User user = *(User *)ctx; 17 MPI_Comm comm = PETSC_COMM_WORLD; 18 ChannelContext channel_ctx; 19 NewtonianIdealGasContext newtonian_ig_ctx; 20 CeedQFunctionContext channel_context; 21 22 PetscFunctionBeginUser; 23 PetscCall(NS_NEWTONIAN_IG(problem, dm, ctx, bc)); 24 PetscCall(PetscCalloc1(1, &channel_ctx)); 25 26 // ------------------------------------------------------ 27 // SET UP Channel 28 // ------------------------------------------------------ 29 CeedQFunctionContextDestroy(&problem->ics.qfunction_context); 30 problem->ics.qfunction = ICsChannel; 31 problem->ics.qfunction_loc = ICsChannel_loc; 32 if (user->phys->state_var == STATEVAR_CONSERVATIVE) { 33 problem->apply_inflow.qfunction = Channel_Inflow; 34 problem->apply_inflow.qfunction_loc = Channel_Inflow_loc; 35 problem->apply_outflow.qfunction = Channel_Outflow; 36 problem->apply_outflow.qfunction_loc = Channel_Outflow_loc; 37 } 38 39 // -- Command Line Options 40 CeedScalar umax = 10.; // m/s 41 CeedScalar theta0 = 300.; // K 42 CeedScalar P0 = 1.e5; // Pa 43 PetscReal body_force_scale = 1.; 44 PetscOptionsBegin(comm, NULL, "Options for CHANNEL problem", NULL); 45 PetscCall(PetscOptionsScalar("-umax", "Centerline velocity of the Channel", NULL, umax, &umax, NULL)); 46 PetscCall(PetscOptionsScalar("-theta0", "Wall temperature", NULL, theta0, &theta0, NULL)); 47 PetscCall(PetscOptionsScalar("-P0", "Pressure at outflow", NULL, P0, &P0, NULL)); 48 PetscCall(PetscOptionsReal("-body_force_scale", "Multiplier for body force", NULL, body_force_scale = 1, &body_force_scale, NULL)); 49 PetscOptionsEnd(); 50 51 PetscScalar meter = user->units->meter; 52 PetscScalar second = user->units->second; 53 PetscScalar Kelvin = user->units->Kelvin; 54 PetscScalar Pascal = user->units->Pascal; 55 56 theta0 *= Kelvin; 57 P0 *= Pascal; 58 umax *= meter / second; 59 60 //-- Setup Problem information 61 CeedScalar H, center; 62 { 63 PetscReal domain_min[3], domain_max[3], domain_size[3]; 64 PetscCall(DMGetBoundingBox(dm, domain_min, domain_max)); 65 for (PetscInt i = 0; i < 3; i++) domain_size[i] = domain_max[i] - domain_min[i]; 66 67 H = 0.5 * domain_size[1] * meter; 68 center = H + domain_min[1] * meter; 69 } 70 71 // Some properties depend on parameters from NewtonianIdealGas 72 CeedQFunctionContextGetData(problem->apply_vol_rhs.qfunction_context, CEED_MEM_HOST, &newtonian_ig_ctx); 73 74 channel_ctx->center = center; 75 channel_ctx->H = H; 76 channel_ctx->theta0 = theta0; 77 channel_ctx->P0 = P0; 78 channel_ctx->umax = umax; 79 channel_ctx->implicit = user->phys->implicit; 80 channel_ctx->B = body_force_scale * 2 * umax * newtonian_ig_ctx->mu / (H * H); 81 82 { 83 // Calculate Body force 84 CeedScalar cv = newtonian_ig_ctx->cv, cp = newtonian_ig_ctx->cp; 85 CeedScalar Rd = cp - cv; 86 CeedScalar rho = P0 / (Rd * theta0); 87 CeedScalar g[] = {channel_ctx->B / rho, 0., 0.}; 88 PetscCall(PetscArraycpy(newtonian_ig_ctx->g, g, 3)); 89 } 90 channel_ctx->newtonian_ctx = *newtonian_ig_ctx; 91 CeedQFunctionContextRestoreData(problem->apply_vol_rhs.qfunction_context, &newtonian_ig_ctx); 92 93 CeedQFunctionContextCreate(user->ceed, &channel_context); 94 CeedQFunctionContextSetData(channel_context, CEED_MEM_HOST, CEED_USE_POINTER, sizeof(*channel_ctx), channel_ctx); 95 CeedQFunctionContextSetDataDestroy(channel_context, CEED_MEM_HOST, FreeContextPetsc); 96 97 problem->ics.qfunction_context = channel_context; 98 CeedQFunctionContextReferenceCopy(channel_context, &problem->apply_inflow.qfunction_context); 99 CeedQFunctionContextReferenceCopy(channel_context, &problem->apply_outflow.qfunction_context); 100 PetscFunctionReturn(0); 101 } 102