diff options
Diffstat (limited to 'c++/boundary.hpp')
| -rw-r--r-- | c++/boundary.hpp | 85 |
1 files changed, 83 insertions, 2 deletions
diff --git a/c++/boundary.hpp b/c++/boundary.hpp index bc4859c..4e30f71 100644 --- a/c++/boundary.hpp +++ b/c++/boundary.hpp @@ -64,10 +64,91 @@ public: } }; -template<typename T, typename Descriptor, bool Dir> -class component<T, Descriptor, cmpt::ZouHeHorizontal<Dir>> final { +/** + * This is massively hacky and expects a lot of conditions + * Either this or mirrored along the horizontal line works + * + * 0 - 2 - 2 + * 0 - 3 - 1 + * 0 - 3 - 1 + * ......... + * 0 - 3 - 1 + * 0 - 2 - 2 + * + */ +template<typename FP, typename Descriptor, bool Dir> +class component<FP, Descriptor, cmpt::ZouHeHorizontal<Dir>> final { private: + saw::data<FP> pressure_setting_; + saw::data<FP> rho_setting_; public: + component(const saw::data<FP>& pressure_setting__): + pressure_setting_{pressure_setting__}, + rho_setting_{pressure_setting__ * df_info<FP,Descriptor>::inv_cs2} + {} + + template<typename CellFieldSchema> + void apply(saw::data<CellFieldSchema>& field, saw::data<sch::FixedArray<sch::UInt64,Descriptor::D>> index, uint64_t time_step){ + using dfi = df_info<FP,Descriptor>; + + bool is_even = ((time_step % 2) == 0); + auto& cell = field(index); + + auto& info = cell.template get<"info">(); + if(info({0u}).get() == 0u){ + return; + } + auto& dfs_old = (is_even) ? cell.template get<"dfs_old">() : cell.template get<"dfs">(); + // auto& dfs = (not is_even) ? cell.template get<"dfs_old">() : cell.template get<"dfs">(); + + /** + * Sum all known DFs + */ + saw::data<FP> sum_df{0}; + for(saw::data<sch::UInt64> k{0u}; k < saw::data<sch::UInt64>{Descriptor::Q}; ++k){ + auto c_k = dfi::directions[k.get()]; + auto& cell_n = field({{index.at({0u})+c_k[0u], index.at({1u})+c_k[1u]}}); + auto& info_n = cell_n.template get<"info">(); + auto info_n_val = info_n({0u}); + auto k_opp = dfi::opposite_index[k.get()]; + + if(info_n_val.get() > 0u){ + sum_df += dfs_old({k_opp}); + } + } + + /** + * Get the sum of the unknown dfs and precalculate the direction + */ + constexpr int known_dir = Dir ? 1 : -1; + auto sum_unknown_dfs = (rho_setting_ - sum_df) * saw::data<FP>{known_dir}; + + for(saw::data<sch::UInt64> k{0u}; k < saw::data<sch::UInt64>{Descriptor::Q}; ++k){ + auto c_k = dfi::directions[k.get()]; + auto& cell_n = field({{index.at({0u})+c_k[0u], index.at({1u})+c_k[1u]}}); + auto& info_n = cell_n.template get<"info">(); + auto info_n_val = info_n({0u}); + // auto k_opp = dfi::opposite_index[k.get()]; + + if(info_n_val.get() > 0u){ + sum_unknown_dfs += dfs_old({k}) * c_k[0u]; + } + } + + auto vel_x = sum_unknown_dfs / rho_setting_; + + static_assert(Descriptor::D == 2u and Descriptor::Q == 9u, "Some parts are hard coded sadly"); + + if constexpr (Dir) { + dfs_old({2u}) = dfs_old({1u}) + saw::data<FP>{2.0 / 3.0} * rho_setting_ * vel_x; + dfs_old({6u}) = dfs_old({5u}) + saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({4u}) - dfs_old({3u})); + dfs_old({8u}) = dfs_old({7u}) + saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({3u}) - dfs_old({4u})); + }else if constexpr (not Dir){ + dfs_old({1u}) = dfs_old({2u}) - saw::data<FP>{2.0 / 3.0} * rho_setting_ * vel_x; + dfs_old({5u}) = dfs_old({6u}) - saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({3u}) - dfs_old({4u})); + dfs_old({7u}) = dfs_old({8u}) - saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({4u}) - dfs_old({3u})); + } + } }; } } |