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#pragma once
#include "common.hpp"
namespace kel {
namespace lbm {
namespace cmpt {
struct FpLbm {};
struct FpLbmOneParticleNoVelocity{};
}
template<typename T, typename Descriptor, typename Encode>
class component<T, Descriptor, cmpt::FpLbm, Encode> final {
private:
saw::data<T> relaxation_;
saw::data<T> frequency_;
public:
component(typename saw::native_data_type<T>::type relaxation__):
relaxation_{{relaxation__}},
frequency_{saw::data<T>{1} / relaxation_}
{}
component(const saw::data<T>& relaxation__):
relaxation_{relaxation__},
frequency_{saw::data<T>{1} / relaxation_}
{}
using Component = cmpt::FpLbm;
template<typename CellFieldSchema, typename MacroFieldSchema>
void apply(const saw::data<CellFieldSchema, Encode>& field, const saw::data<MacroFieldSchema,Encode>& macros, saw::data<sch::FixedArray<sch::UInt64,Descriptor::D>> index, saw::data<sch::UInt64> time_step) const {
// void apply(saw::data<CellFieldSchema, Encode>& field, saw::data<sch::FixedArray<sch::UInt64, Descriptor::D>> index, saw::data<sch::UInt64> time_step){
bool is_even = ((time_step.get() % 2) == 0);
auto& dfs_old_f = (is_even) ? field.template get<"dfs_old">() : field.template get<"dfs">();
auto& dfs = dfs_old_f.at(index);
auto& rho_f = macros.template get<"density">();
auto& vel_f = macros.template get<"velocity">();
saw::data<sch::Scalar<T>>& rho = rho_f.at(index);
saw::data<sch::Vector<T,Descriptor::D>>& vel = vel_f.at(index);
compute_rho_u<T,Descriptor>(dfs_old_f.at(index),rho,vel);
auto eq = equilibrium<T,Descriptor>(rho,vel);
using dfi = df_info<T,Descriptor>;
auto& force_f = macros.template get<"force">();
auto& force = force_f.at(index);
auto& porosity_f = macros.template get<"porosity">();
auto& porosity = porosity_f.at(index);
saw::data<sch::Scalar<T>> dfi_inv_cs2;
dfi_inv_cs2.at({}).set(dfi::inv_cs2);
for(uint64_t i = 0u; i < Descriptor::Q; ++i){
// saw::data<T> ci_min_u{0};
saw::data<sch::Vector<T,Descriptor::D>> ci;
for(uint64_t d = 0u; d < Descriptor::D; ++d){
ci.at({{d}}).set(static_cast<typename saw::native_data_type<T>::type>(dfi::directions[i][d]));
}
auto ci_dot_u = saw::math::dot(ci,vel);
// saw::data<sch::Vector<T,Descriptor::D>> F_i;
// F_i = f * (c_i - u * ics2 + <c_i,u> * c_i * ics2 * ics2) * w_i;
saw::data<sch::Scalar<T>> w;
w.at({}).set(dfi::weights[i]);
auto F_i_d = saw::math::dot(force * w, (ci - vel * dfi_inv_cs2 + ci * ci_dot_u * dfi_inv_cs2 * dfi_inv_cs2 ));
/*
saw::data<sch::Scalar<T>> F_i_sum;
for(uint64_t d = 0u; d < Descriptor::D; ++d){
saw::data<sch::Scalar<T>> F_i_d;
F_i_d.at({}) = F_i.at({{d}});
F_i_sum = F_i_sum + F_i_d;
}
*/
dfs.at({i}) = dfs.at({i}) + frequency_ * (eq.at(i) - dfs.at({i}) ) + F_i_d.at({}) * (saw::data<T>{1} - saw::data<T>{0.5f} * frequency_);
}
}
};
template<typename T, typename Descriptor, typename Encode>
class component<T, Descriptor, cmpt::FpLbmOneParticleNoVelocity, Encode> final {
private:
saw::data<T> relaxation_;
saw::data<T> frequency_;
public:
component(typename saw::native_data_type<T>::type relaxation__):
relaxation_{{relaxation__}},
frequency_{saw::data<T>{1} / relaxation_}
{}
component(const saw::data<T>& relaxation__):
relaxation_{relaxation__},
frequency_{saw::data<T>{1} / relaxation_}
{}
using Component = cmpt::FpLbmOneParticleNoVelocity;
template<typename CellFieldSchema, typename MacroFieldSchema>
void apply(const saw::data<CellFieldSchema, Encode>& field, const saw::data<MacroFieldSchema,Encode>& macros, saw::data<sch::FixedArray<sch::UInt64,Descriptor::D>> index, saw::data<sch::UInt64> time_step) const {
// void apply(saw::data<CellFieldSchema, Encode>& field, saw::data<sch::FixedArray<sch::UInt64, Descriptor::D>> index, saw::data<sch::UInt64> time_step){
bool is_even = ((time_step.get() % 2) == 0);
auto& dfs_old_f = (is_even) ? field.template get<"dfs_old">() : field.template get<"dfs">();
auto& dfs = dfs_old_f.at(index);
auto& rho_f = macros.template get<"density">();
auto& vel_f = macros.template get<"velocity">();
auto& por_f = macros.template get<"porosity">();
saw::data<sch::Scalar<T>>& rho = rho_f.at(index);
saw::data<sch::Scalar<T>> half;
half.at({}).set(0.5);
saw::data<sch::Vector<T,Descriptor::D>>& vel = vel_f.at(index);// + total_force * ( half / rho );
compute_rho_u<T,Descriptor>(dfs_old_f.at(index),rho,vel);
auto eq = equilibrium<T,Descriptor>(rho,vel);
using dfi = df_info<T,Descriptor>;
saw::data<sch::Scalar<T>> min_two;
min_two.at({}).set(-2);
auto force = vel * rho * min_two * por_f.at(index);
saw::data<sch::Scalar<T>> dfi_inv_cs2;
dfi_inv_cs2.at({}).set(dfi::inv_cs2);
// auto vel = vel_f.at(index);
for(uint64_t i = 0u; i < Descriptor::Q; ++i){
// saw::data<T> ci_min_u{0};
saw::data<sch::Vector<T,Descriptor::D>> ci;
for(uint64_t d = 0u; d < Descriptor::D; ++d){
ci.at({{d}}).set(static_cast<typename saw::native_data_type<T>::type>(dfi::directions[i][d]));
}
auto ci_dot_u = saw::math::dot(ci,vel);
// saw::data<sch::Vector<T,Descriptor::D>> F_i;
// F_i = f * ((c_i - u) * ics2 + <c_i,u> * c_i * ics2 * ics2) * w_i;
saw::data<sch::Scalar<T>> w;
w.at({}).set(dfi::weights[i]);
/*
saw::data<sch::Scalar<T>> F_i_sum;
for(uint64_t d = 0u; d < Descriptor::D; ++d){
saw::data<sch::Scalar<T>> F_i_d;
F_i_d.at({}) = F_i.at({{d}});
F_i_sum = F_i_sum + F_i_d;
}
*/
auto term1 = (ci-vel) * dfi_inv_cs2;
auto term2 = ci * (ci_dot_u * dfi_inv_cs2 * dfi_inv_cs2);
auto force_projection = saw::math::dot(term1 + term2, force);
auto F_i = w * force_projection;
dfs.at({i}) = dfs.at({i})
+ frequency_
* (eq.at(i) - dfs.at({i}) )
+ F_i.at({})
* (saw::data<T>{1} - saw::data<T>{0.5f} * frequency_);
}
}
};
}
}
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