Refactor void fraction out of solver #1392
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blaisb
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voferreira
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Dec 3, 2024
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Co-authored-by: Amishga Alphonius <107414376+AmishgaAlphonius@users.noreply.github.com>
AmishgaAlphonius
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Dec 4, 2024
include/fem-dem/void_fraction.h
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| public: | ||
| VoidFractionBase( | ||
| parallel::DistributedTriangulationBase<dim> *triangulation, | ||
| std::shared_ptr<Parameters::VoidFractionParameters<dim>> input_parameters, | ||
| const Parameters::LinearSolver &linear_solver_parameters, | ||
| Particles::ParticleHandler<dim> *particle_handler, | ||
| const unsigned int fe_degree, | ||
| const bool simplex, | ||
| const ConditionalOStream &pcout) | ||
| : PhysicsLinearSubequationsSolver(pcout) | ||
| , dof_handler(*triangulation) | ||
| , triangulation(triangulation) | ||
| , void_fraction_parameters(input_parameters) | ||
| , linear_solver_parameters(linear_solver_parameters) | ||
| // BB TODO verify if the particle handler can be remade const | ||
| , particle_handler(particle_handler) |
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Still missing the brief for the constructor
source/fem-dem/void_fraction.cc
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| const MPI_Comm mpi_communicator = dof_handler.get_communicator(); | ||
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| dof_handler.distribute_dofs(*fe); | ||
| locally_owned_dofs = dof_handler.locally_owned_dofs(); | ||
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| locally_relevant_dofs = DoFTools::extract_locally_relevant_dofs(dof_handler); | ||
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| void_fraction_constraints.clear(); | ||
| void_fraction_constraints.reinit(locally_relevant_dofs); | ||
| DoFTools::make_hanging_node_constraints(dof_handler, | ||
| void_fraction_constraints); | ||
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| /// TODO ADD Periodic constraints | ||
| void_fraction_constraints.close(); | ||
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| void_fraction_locally_relevant.reinit(locally_owned_dofs, | ||
| locally_relevant_dofs, | ||
| mpi_communicator); | ||
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| this->previous_void_fraction.resize(maximum_number_of_previous_solutions()); | ||
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| // Initialize vector of previous solutions for the void fraction | ||
| for (auto &solution : this->previous_void_fraction) | ||
| { | ||
| solution.reinit(this->locally_owned_dofs, | ||
| this->locally_relevant_dofs, | ||
| this->triangulation->get_communicator()); | ||
| } | ||
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| void_fraction_locally_owned.reinit(locally_owned_dofs, | ||
| this->triangulation->get_communicator()); |
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In that case, why is the local copy not used everywhere here?
Co-authored-by: Amishga Alphonius <107414376+AmishgaAlphonius@users.noreply.github.com>
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Thanks for the nice thorough review @AmishgaAlphonius and @voferreira . Really helped a lot. |
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Description
The facilities required to calculate the void fraction were all contained within the unresolved CFD-DEM solver and the VANS solver. This is very problematic, because it makes it difficult to develop new void fraction schemes, but also prevents the development of new VANS schemes (e.g. matrix free). Consequently, I Have used the new interface developed by @AmishgaAlphonius to refactor the void fraction calculation completely out of the VANS and unresolved CFD-DEM solver. The result is very lightweight.
I also took the opportunity to deprecate the bounding of the void fraction. This feature was never used and was actually dangerous for convergence. Consequently, it has now been fully deprecated and the documentation has been adapted.
Testing
None of the tests results were changed, this is great since nothing should have changed.
Documentation
I have removed the documentation related to the bounding of the void fraction and all of its mention within the examples.
Miscellaneous (will be removed when merged)
Checklist (will be removed when merged)
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