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Merge pull request #108 from streeve/heat_transfer
Add heat transfer
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,16 @@ | ||
| { | ||
| "num_cells" : {"value": [49, 49, 49]}, | ||
| "system_size" : {"value": [0.1, 0.1, 0.1], "unit": "m"}, | ||
| "density" : {"value": 8915, "unit": "kg/m^3"}, | ||
| "elastic_modulus" : {"value": 115e+9, "unit": "Pa"}, | ||
| "thermal_expansion_coeff" : {"value": 17e-6, "unit": "oC^{-1}"}, | ||
| "thermal_conductivity" : {"value": 387, "unit": "W/(m.K)"}, | ||
| "specific_heat_capacity" : {"value": 385, "unit": "J/(kg.K)"}, | ||
| "reference_temperature" : {"value": 100.0, "unit": "oC"}, | ||
| "horizon" : {"value": 0.00615, "unit": "m"}, | ||
| "final_time" : {"value": 8, "unit": "s"}, | ||
| "timestep" : {"value": 0.02, "unit": "s", "note": "This timestep is too large for mechanics to be stable. Use thermal_deformation_heat_transfer.json instead if coupled thermomechanics is desired."}, | ||
| "thermal_subcycle_steps" : {"value": 1}, | ||
| "output_frequency" : {"value": 10}, | ||
| "output_reference" : {"value": true} | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,16 @@ | ||
| { | ||
| "num_cells" : {"value": [100, 30, 3]}, | ||
| "system_size" : {"value": [1.0, 0.3, 0.03], "unit": "m"}, | ||
| "density" : {"value": 3980, "unit": "kg/m^3"}, | ||
| "elastic_modulus" : {"value": 370e+9, "unit": "Pa"}, | ||
| "thermal_coefficient" : {"value": 7.5E-6, "unit": "oC^{-1}"}, | ||
| "reference_temperature" : {"value": 20.0, "unit": "oC"}, | ||
| "horizon" : {"value": 0.03, "unit": "m"}, | ||
| "final_time" : {"value": 0.01, "unit": "s"}, | ||
| "timestep" : {"value": 7.5E-7, "unit": "s"}, | ||
| "output_frequency" : {"value": 100}, | ||
| "output_reference" : {"value": true} | ||
| "num_cells" : {"value": [101, 31, 3]}, | ||
| "system_size" : {"value": [1.0, 0.3, 0.03], "unit": "m"}, | ||
| "density" : {"value": 3980, "unit": "kg/m^3"}, | ||
| "elastic_modulus" : {"value": 370e+9, "unit": "Pa"}, | ||
| "thermal_expansion_coeff" : {"value": 7.5E-6, "unit": "oC^{-1}"}, | ||
| "thermal_conductivity" : {"value": 31, "unit": "W/(m.K)"}, | ||
| "specific_heat_capacity" : {"value": 880, "unit": "J/(kg.K)"}, | ||
| "reference_temperature" : {"value": 20.0, "unit": "oC"}, | ||
| "horizon" : {"value": 0.03, "unit": "m"}, | ||
| "final_time" : {"value": 0.01, "unit": "s"}, | ||
| "timestep" : {"value": 7.5E-7, "unit": "s"}, | ||
| "thermal_subcycle_steps": {"value": 100}, | ||
| "output_frequency" : {"value": 100}, | ||
| "output_reference" : {"value": true} | ||
| } |
16 changes: 16 additions & 0 deletions
16
examples/thermomechanics/inputs/thermal_deformation_heat_transfer.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| { | ||
| "num_cells" : {"value": [49, 49, 49]}, | ||
| "system_size" : {"value": [0.1, 0.1, 0.1], "unit": "m"}, | ||
| "density" : {"value": 8915, "unit": "kg/m^3"}, | ||
| "elastic_modulus" : {"value": 115e+9, "unit": "Pa"}, | ||
| "thermal_expansion_coeff" : {"value": 17e-6, "unit": "oC^{-1}"}, | ||
| "thermal_conductivity" : {"value": 387, "unit": "W/(m.K)"}, | ||
| "specific_heat_capacity" : {"value": 385, "unit": "J/(kg.K)"}, | ||
| "reference_temperature" : {"value": 100.0, "unit": "oC"}, | ||
| "horizon" : {"value": 0.00615, "unit": "m"}, | ||
| "final_time" : {"value": 8, "unit": "s"}, | ||
| "timestep" : {"value": 4.2e-07, "unit": "s"}, | ||
| "thermal_subcycle_steps" : {"value": 5e+4}, | ||
| "output_frequency" : {"value": 10}, | ||
| "output_reference" : {"value": true} | ||
| } |
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158 changes: 158 additions & 0 deletions
158
examples/thermomechanics/thermal_deformation_heat_transfer.cpp
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| /**************************************************************************** | ||
| * Copyright (c) 2022 by Oak Ridge National Laboratory * | ||
| * All rights reserved. * | ||
| * * | ||
| * This file is part of CabanaPD. CabanaPD is distributed under a * | ||
| * BSD 3-clause license. For the licensing terms see the LICENSE file in * | ||
| * the top-level directory. * | ||
| * * | ||
| * SPDX-License-Identifier: BSD-3-Clause * | ||
| ****************************************************************************/ | ||
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| #include <fstream> | ||
| #include <iostream> | ||
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| #include "mpi.h" | ||
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| #include <Kokkos_Core.hpp> | ||
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| #include <CabanaPD.hpp> | ||
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| // Simulate heat transfer in a pseudo-1d cube. | ||
| void thermalDeformationHeatTransferExample( const std::string filename ) | ||
| { | ||
| // ==================================================== | ||
| // Use default Kokkos spaces | ||
| // ==================================================== | ||
| using exec_space = Kokkos::DefaultExecutionSpace; | ||
| using memory_space = typename exec_space::memory_space; | ||
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| // ==================================================== | ||
| // Read inputs | ||
| // ==================================================== | ||
| CabanaPD::Inputs inputs( filename ); | ||
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| // ==================================================== | ||
| // Material and problem parameters | ||
| // ==================================================== | ||
| // Material parameters | ||
| double rho0 = inputs["density"]; | ||
| double E = inputs["elastic_modulus"]; | ||
| double nu = 0.25; | ||
| double K = E / ( 3 * ( 1 - 2 * nu ) ); | ||
| double delta = inputs["horizon"]; | ||
| double alpha = inputs["thermal_expansion_coeff"]; | ||
| double kappa = inputs["thermal_conductivity"]; | ||
| double cp = inputs["specific_heat_capacity"]; | ||
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| // Problem parameters | ||
| double temp0 = inputs["reference_temperature"]; | ||
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| // ==================================================== | ||
| // Discretization | ||
| // ==================================================== | ||
| // FIXME: set halo width based on delta | ||
| std::array<double, 3> low_corner = inputs["low_corner"]; | ||
| std::array<double, 3> high_corner = inputs["high_corner"]; | ||
| std::array<int, 3> num_cells = inputs["num_cells"]; | ||
| int m = std::floor( delta / | ||
| ( ( high_corner[0] - low_corner[0] ) / num_cells[0] ) ); | ||
| int halo_width = m + 1; // Just to be safe. | ||
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| // ==================================================== | ||
| // Force model type | ||
| // ==================================================== | ||
| using model_type = CabanaPD::PMB; | ||
| using thermal_type = CabanaPD::DynamicTemperature; | ||
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| // ==================================================== | ||
| // Particle generation | ||
| // ==================================================== | ||
| // Does not set displacements, velocities, etc. | ||
| auto particles = | ||
| std::make_shared<CabanaPD::Particles<memory_space, model_type, | ||
| typename thermal_type::base_type>>( | ||
| exec_space(), low_corner, high_corner, num_cells, halo_width ); | ||
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| // ==================================================== | ||
| // Custom particle initialization | ||
| // ==================================================== | ||
| auto rho = particles->sliceDensity(); | ||
| auto temp = particles->sliceTemperature(); | ||
| auto init_functor = KOKKOS_LAMBDA( const int pid ) | ||
| { | ||
| // Density | ||
| rho( pid ) = rho0; | ||
| // Temperature | ||
| temp( pid ) = temp0; | ||
| }; | ||
| particles->updateParticles( exec_space{}, init_functor ); | ||
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| // ==================================================== | ||
| // Force model | ||
| // ==================================================== | ||
| auto force_model = CabanaPD::createForceModel( | ||
| model_type{}, CabanaPD::Elastic{}, *particles, delta, K, kappa, cp, | ||
| alpha, temp0 ); | ||
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| // ==================================================== | ||
| // Create solver | ||
| // ==================================================== | ||
| auto cabana_pd = CabanaPD::createSolverElastic<memory_space>( | ||
| inputs, particles, force_model ); | ||
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| // ==================================================== | ||
| // Boundary condition | ||
| // ==================================================== | ||
| // Temperature profile imposed on top and bottom surfaces | ||
| double dy = particles->dx[1]; | ||
| using plane_type = CabanaPD::RegionBoundary<CabanaPD::RectangularPrism>; | ||
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| // Top surface | ||
| plane_type plane1( low_corner[0], high_corner[0], high_corner[1] - dy, | ||
| high_corner[1] + dy, low_corner[2], high_corner[2] ); | ||
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| // Bottom surface | ||
| plane_type plane2( low_corner[0], high_corner[0], low_corner[1] - dy, | ||
| low_corner[1] + dy, low_corner[2], high_corner[2] ); | ||
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| // This is purposely delayed until after solver init so that ghosted | ||
| // particles are correctly taken into account for lambda capture here. | ||
| temp = particles->sliceTemperature(); | ||
| auto temp_bc = KOKKOS_LAMBDA( const int pid, const double ) | ||
| { | ||
| temp( pid ) = 0.0; | ||
| }; | ||
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| std::vector<plane_type> planes = { plane1, plane2 }; | ||
| auto bc = CabanaPD::createBoundaryCondition( | ||
| temp_bc, exec_space{}, *particles, planes, false, 1.0 ); | ||
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| // ==================================================== | ||
| // Simulation run | ||
| // ==================================================== | ||
| cabana_pd->init( bc ); | ||
| cabana_pd->run( bc ); | ||
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| // ==================================================== | ||
| // Outputs | ||
| // ==================================================== | ||
| // Output temperature along the y-axis | ||
| int profile_dim = 1; | ||
| auto value = KOKKOS_LAMBDA( const int pid ) { return temp( pid ); }; | ||
| std::string file_name = "temperature_yaxis_profile.txt"; | ||
| createOutputProfile( MPI_COMM_WORLD, num_cells[1], profile_dim, file_name, | ||
| *particles, value ); | ||
| } | ||
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| // Initialize MPI+Kokkos. | ||
| int main( int argc, char* argv[] ) | ||
| { | ||
| MPI_Init( &argc, &argv ); | ||
| Kokkos::initialize( argc, argv ); | ||
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| thermalDeformationHeatTransferExample( argv[1] ); | ||
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| Kokkos::finalize(); | ||
| MPI_Finalize(); | ||
| } |
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