diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/poiseulle_particles_channel_2d.cpp | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/examples/poiseulle_particles_channel_2d.cpp b/examples/poiseulle_particles_channel_2d.cpp index 4673a2a..f098ca0 100644 --- a/examples/poiseulle_particles_channel_2d.cpp +++ b/examples/poiseulle_particles_channel_2d.cpp @@ -315,6 +315,9 @@ void couple_particles_to_lattice( // Prepare force sum // saw::data<sch::Vector<sch::T,2u>> forces; + // Maybe in the future? + // bool collision_happened = false; + iterate_over([&](const saw::data<sch::FixedArray<sch::UInt64,2u>>& index){ if(p_mask_grid.at(index).get() == 0){ @@ -334,10 +337,12 @@ void couple_particles_to_lattice( // Cast down to get lower corner. // Before casting shift by 0.5 for closest pick - saw::data<sch::FixedArray<sch::UInt64,2u>> p_cell_pos {{ - static_cast<uint64_t>(p_pos_lie.at({{0u}}).get()+0.5), - static_cast<uint64_t>(p_pos_lie.at({{1u}}).get()+0.5) - }}; + saw::data<sch::FixedArray<sch::UInt64,2u>> p_cell_pos; + + { + p_cell_pos.at({{0u}}) = {static_cast<uint64_t>(p_pos_lie.at({{0u}}).get()+0.5)}; + p_cell_pos.at({{1u}}) = {static_cast<uint64_t>(p_pos_lie.at({{1u}}).get()+0.5)}; + } p_cell_pos.at({{0u}}).set(std::max(1ul, std::min(p_cell_pos.at({{0u}}).get(), meta.at({0u}).get()-2ul))); p_cell_pos.at({{1u}}).set(std::max(1ul, std::min(p_cell_pos.at({{1u}}).get(), meta.at({1u}).get()-2ul))); @@ -362,6 +367,27 @@ void couple_particles_to_lattice( // Add forces to put away from walls /// 1. Check if neighbour is wall + + auto& cell = latt(p_cell_pos); + auto& p_info = cell.template get<"info">()({0u}); + if(p_info.get() <= 1u){ + // Fake solid normal + auto solid_normal = p_pos - p_cell_pos; + solid_normal = saw::math::normalize(solid_normal); + auto v_n = saw::math::dot(solid_normal,p_vel); + + + { + saw::data<sch::Scalar<sch::T>> one; + one.at({}) = {1.0}; + auto vn_plus_one = one + v_n; + solid_normal.at({{0u}}) = solid_normal.at({{0u}}) + vn_plus_one.at({}); + solid_normal.at({{1u}}) = solid_normal.at({{1u}}) + vn_plus_one.at({}); + } + auto force_normal = solid_normal; + p_acc = p_acc + force_normal; + } + /* for(saw::data<sch::UInt64> k{0u}; k.get() < sch::D2Q9::Q; ++k){ auto n_p_cell_pos = saw::data<sch::FixedArray<sch::UInt64,2u>> {{ p_cell_pos.at({{0u}}) + dfi::directions[k.get()][0u], @@ -388,8 +414,8 @@ void couple_particles_to_lattice( saw::data<sch::Vector<sch::T,sch::D2Q9::D>> push_force; { - push_force.at({{0u}}) = saw::data<sch::Int32>{1000 * dfi::directions[dfi::opposite_index[k.get()]][0u]}.template cast_to<sch::T>(); - push_force.at({{1u}}) = saw::data<sch::Int32>{1000 * dfi::directions[dfi::opposite_index[k.get()]][1u]}.template cast_to<sch::T>(); + push_force.at({{0u}}) = saw::data<sch::Int32>{1000000 * dfi::directions[dfi::opposite_index[k.get()]][0u]}.template cast_to<sch::T>(); + push_force.at({{1u}}) = saw::data<sch::Int32>{1000000 * dfi::directions[dfi::opposite_index[k.get()]][1u]}.template cast_to<sch::T>(); } //n_debug_acc = n_debug_acc + push_force; @@ -397,14 +423,16 @@ void couple_particles_to_lattice( } } } + */ /// 2. Add force pushing away from wall // Add forces to push away from other particles }, {{0u,0u}}, p_mask_grid.dims()); - p_acc.at({{0u}}).set(p_acc.at({{0u}}).get() / (p_mask.template get<"grid">().dims().at({{0u}}).get() *p_mask.template get<"grid">().dims().at({{1u}}).get() )); - p_acc.at({{1u}}).set(p_acc.at({{1u}}).get() / (p_mask.template get<"grid">().dims().at({{0u}}).get() *p_mask.template get<"grid">().dims().at({{1u}}).get() )); + + //p_acc.at({{0u}}).set(p_acc.at({{0u}}).get() / (p_mask.template get<"grid">().dims().at({{0u}}).get() *p_mask.template get<"grid">().dims().at({{1u}}).get() )); + // p_acc.at({{1u}}).set(p_acc.at({{1u}}).get() / (p_mask.template get<"grid">().dims().at({{0u}}).get() *p_mask.template get<"grid">().dims().at({{1u}}).get() )); } } |