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-rw-r--r--lib/core/c++/boundary.hpp8
-rw-r--r--lib/core/c++/collision.hpp15
-rw-r--r--lib/core/c++/particle/particle.hpp100
-rw-r--r--lib/core/tests/particles.cpp29
4 files changed, 108 insertions, 44 deletions
diff --git a/lib/core/c++/boundary.hpp b/lib/core/c++/boundary.hpp
index 4dbbdf8..01ae7b5 100644
--- a/lib/core/c++/boundary.hpp
+++ b/lib/core/c++/boundary.hpp
@@ -211,12 +211,12 @@ public:
if constexpr (Dir) {
dfs_old.at({2u}) = dfs_old.at({1u}) + saw::data<FP>{2.0 / 3.0} * rho_vel_x;
- dfs_old.at({6u}) = dfs_old.at({5u}) + saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({4u}) - dfs_old.at({3u}));
- dfs_old.at({8u}) = dfs_old.at({7u}) + saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({3u}) - dfs_old.at({4u}));
+ dfs_old.at({6u}) = dfs_old.at({5u}) + saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({3u}) - dfs_old.at({4u}));
+ dfs_old.at({8u}) = dfs_old.at({7u}) + saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({4u}) - dfs_old.at({3u}));
}else if constexpr (not Dir){
dfs_old.at({1u}) = dfs_old.at({2u}) - saw::data<FP>{2.0 / 3.0} * rho_vel_x;
- dfs_old.at({5u}) = dfs_old.at({6u}) - saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({3u}) - dfs_old.at({4u}));
- dfs_old.at({7u}) = dfs_old.at({8u}) - saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({4u}) - dfs_old.at({3u}));
+ dfs_old.at({5u}) = dfs_old.at({6u}) - saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({4u}) - dfs_old.at({3u}));
+ dfs_old.at({7u}) = dfs_old.at({8u}) - saw::data<FP>{1.0 / 6.0} * rho_vel_x + saw::data<FP>{0.5} * (dfs_old.at({3u}) - dfs_old.at({4u}));
}
}
};
diff --git a/lib/core/c++/collision.hpp b/lib/core/c++/collision.hpp
index f8312c0..df45bbe 100644
--- a/lib/core/c++/collision.hpp
+++ b/lib/core/c++/collision.hpp
@@ -95,10 +95,21 @@ class component<T, Descriptor, cmpt::BGKGuo, Encode> {
private:
typename saw::native_data_type<T>::type relaxation_;
saw::data<T> frequency_;
+ saw::data<sch::Vector<T,Descriptor::D>> global_force_;
public:
component(typename saw::native_data_type<T>::type relaxation__):
relaxation_{relaxation__},
- frequency_{typename saw::native_data_type<T>::type(1) / relaxation_}
+ frequency_{typename saw::native_data_type<T>::type(1) / relaxation_},
+ global_force_{}
+ {}
+
+ component(
+ typename saw::native_data_type<T>::type relaxation__,
+ saw::data<sch::Vector<T,Descriptor::D>>& global_force__
+ ):
+ relaxation_{relaxation__},
+ frequency_{typename saw::native_data_type<T>::type(1) / relaxation_},
+ global_force_{global_force__}
{}
using Component = cmpt::BGKGuo;
@@ -153,7 +164,7 @@ public:
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 ));
+ auto F_i_d = saw::math::dot((force+global_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){
diff --git a/lib/core/c++/particle/particle.hpp b/lib/core/c++/particle/particle.hpp
index 8ef590d..c0d115f 100644
--- a/lib/core/c++/particle/particle.hpp
+++ b/lib/core/c++/particle/particle.hpp
@@ -1,8 +1,10 @@
#pragma once
-#include <forstio/codec/data.hpp>
-#include <forstio/codec/data_math.hpp>
#include <forstio/codec/math.hpp>
+#include <forstio/codec/data_math.hpp>
+#include <forstio/codec/data.hpp>
+
+#include "../iterator.hpp"
namespace kel {
namespace lbm {
@@ -43,17 +45,65 @@ using ParticleCollisionSpheroid = Struct<
Member<Scalar<T>, "radius">
>;
-template<typename T, uint64_t D, typename CollisionType = ParticleCollisionSpheroid<T>>
+template<typename T, uint64_t D>
using Particle = Struct<
- Member<ParticleRigidBody<T,D>, "rigid_body">,
- Member<CollisionType, "collision">,
+ Member<ParticleRigidBody<T,D>, "rigid_body">
// Problem is that dynamic data would two layered
- // Member<FixedArray<Float64,D,D,D>, "mask">,
- Member<Scalar<T>, "mass">
+ // Member<Array<Float64,D>, "mask">,
+>;
+
+template<typename T, uint64_t D, typename CollisionType = ParticleCollisionSpheroid<T>>
+using ParticleGroup = Struct<
+ Member<Array<T,D>, "mask">,
+ Member<CollisionType, "collision">,
+ Member<Scalar<T>, "mass">,
+ Member<Array<Particle<T,D>>, "particles">
>;
}
template<typename T, uint64_t D>
+saw::data<sch::ParticleGroup<T,D, sch::ParticleCollisionSpheroid<T>>> create_spheroid_particle_group(
+ saw::data<sch::Scalar<T>> rad_p,
+ saw::data<sch::Scalar<T>> density_p,
+ const saw::data<sch::UInt64>& mask_resolution
+){
+ saw::data<sch::ParticleGroup<T,D,sch::ParticleCollisionSpheroid<T>>> part;
+
+ auto& mask = part.template get<"mask">();
+ auto& collision = part.template get<"collision">();
+ auto& mass = part.template get<"mass">();
+
+ if constexpr ( D == 1u ){
+ saw::data<sch::Scalar<T>> c;
+ c.at({}).set(2.0);
+ mass = rad_p * c * density_p;
+ } else if constexpr ( D == 2u){
+ saw::data<sch::Scalar<T>> pi;
+ pi.at({}).set(3.14159);
+ mass = rad_p * rad_p * pi * density_p;
+ } else if constexpr ( D == 3u ){
+ saw::data<sch::Scalar<T>> c;
+ c.at({}).set(3.14159 * 4.0 / 3.0);
+ mass = rad_p * rad_p * rad_p * c * density_p;
+ } else {
+ static_assert(D == 0u or D > 3u, "Dimensions only supported for Dim 1,2 & 3.");
+ }
+
+ saw::data<sch::FixedArray<sch::UInt64,D>> mask_dims;
+ for(uint64_t i = 0u; i < D; ++i){
+ mask_dims.at({i}) = mask_resolution;
+ }
+
+ mask = {mask_dims};
+ iterator<D>::apply([&](const auto& index){
+
+ },{},mask_dims);
+
+ return part;
+}
+
+/*
+template<typename T, uint64_t D>
saw::data<sch::Particle<T,D, sch::ParticleCollisionSpheroid<T>>> create_spheroid_particle(
saw::data<sch::Vector<T,D>> pos_p,
saw::data<sch::Vector<T,D>> vec_p,
@@ -103,6 +153,7 @@ saw::data<sch::Particle<T,D, sch::ParticleCollisionSpheroid<T>>> create_spheroid
return part;
}
+*/
template<typename T,uint64_t D>
constexpr auto verlet_step_lambda = [](saw::data<sch::Particle<T,D>>& particle, saw::data<sch::Scalar<T>> time_step_delta){
@@ -139,18 +190,20 @@ constexpr auto verlet_step_lambda = [](saw::data<sch::Particle<T,D>>& particle,
};
template<typename T, uint64_t D>
-constexpr auto handle_collision = [](saw::data<sch::Particle<T,D>>& left, saw::data<sch::Particle<T,D>>& right, saw::data<sch::Vector<T,D>> unit_pos_rel, saw::data<sch::Vector<T,D>> vel_rel, saw::data<sch::Scalar<T>> d_t)
-{
+constexpr auto handle_collision = [](
+ saw::data<sch::Particle<T,D>>& left, const saw::data<sch::Scalar<T>>& mass_l,
+ saw::data<sch::Particle<T,D>>& right, const saw::data<sch::Scalar<T>>& mass_r,
+ saw::data<sch::Vector<T,D>> unit_pos_rel, saw::data<sch::Vector<T,D>> vel_rel,
+ saw::data<sch::Scalar<T>> d_t
+){
auto& rb_l = left.template get<"rigid_body">();
auto& pos_l = rb_l.template get<"position">();
auto& pos_old_l = rb_l.template get<"position_old">();
- auto& mass_l = left.template get<"mass">();
auto vel_l = (pos_l-pos_old_l)/d_t;
auto& rb_r = right.template get<"rigid_body">();
auto& pos_r = rb_r.template get<"position">();
auto& pos_old_r = rb_r.template get<"position_old">();
- auto& mass_r = left.template get<"mass">();
auto vel_r = (pos_r-pos_old_r)/d_t;
auto vel_pos_rel_dot = saw::math::dot(unit_pos_rel,vel_rel);
@@ -162,10 +215,16 @@ constexpr auto handle_collision = [](saw::data<sch::Particle<T,D>>& left, saw::d
};
-template<typename T, uint64_t D>
-constexpr auto broadphase_collision_distance_squared = [](saw::data<sch::Particle<T,D>>& left, saw::data<sch::Particle<T,D>>& right) -> std::pair<bool,saw::data<sch::Scalar<T>>>{
- auto rad_l = left.template get<"collision">().template get<"radius">();
- auto rad_r = right.template get<"collision">().template get<"radius">();
+template<typename T, uint64_t D, typename Collision>
+constexpr auto broadphase_collision_distance_squared = [](
+ saw::data<sch::Particle<T,D>>& left,
+ const saw::data<Collision>& coll_l,
+ saw::data<sch::Particle<T,D>>& right,
+ const saw::data<Collision>& coll_r
+) -> std::pair<bool,saw::data<sch::Scalar<T>>>{
+
+ auto rad_l = coll_l.template get<"radius">();
+ auto rad_r = coll_r.template get<"radius">();
auto& rb_l = left.template get<"rigid_body">();
auto& rb_r = right.template get<"rigid_body">();
@@ -187,9 +246,14 @@ constexpr auto broadphase_collision_distance_squared = [](saw::data<sch::Particl
*
*
*/
-template<typename T, uint64_t D>
-constexpr auto broadphase_collision_check = [](saw::data<sch::Particle<T,D>>& left, saw::data<sch::Particle<T,D>>& right) -> bool{
- return broadphase_collision_distance_squared<T,D>(left,right).first;
+template<typename T, uint64_t D, typename Collision>
+constexpr auto broadphase_collision_check = [](
+ saw::data<sch::Particle<T,D>>& left,
+ const saw::data<Collision>& coll_l,
+ saw::data<sch::Particle<T,D>>& right,
+ const saw::data<Collision>& coll_r
+) -> bool{
+ return broadphase_collision_distance_squared<T,D,Collision>(left,coll_l,right,coll_r).first;
};
}
}
diff --git a/lib/core/tests/particles.cpp b/lib/core/tests/particles.cpp
index a9984ec..1c18fbb 100644
--- a/lib/core/tests/particles.cpp
+++ b/lib/core/tests/particles.cpp
@@ -29,7 +29,7 @@ SAW_TEST("Verlet step 2D - Planar"){
SAW_EXPECT(pos.at({{0}}).get() == 0.25, std::string{"Incorrect Pos X: "} + std::to_string(pos.at({{0}}).get()));
SAW_EXPECT(pos.at({{1}}).get() == 0.0, std::string{"Incorrect Pos Y: "} + std::to_string(pos.at({{1}}).get()));
}
-
+/*
SAW_TEST("No Collision Spheroid 2D"){
using namespace kel;
@@ -37,10 +37,6 @@ SAW_TEST("No Collision Spheroid 2D"){
{
auto& body = part_a.template get<"rigid_body">();
auto& pos = body.template get<"position">();
- auto& coll = part_a.template get<"collision">();
- auto& radius = coll.template get<"radius">();
-
- radius.at({}).set(1.0);
pos.at({{0u}}) = 0.1;
pos.at({{1u}}) = 0.2;
@@ -50,11 +46,7 @@ SAW_TEST("No Collision Spheroid 2D"){
{
auto& body = part_b.template get<"rigid_body">();
auto& pos = body.template get<"position">();
- auto& coll = part_b.template get<"collision">();
- auto& radius = coll.template get<"radius">();
- radius.at({}).set(1.0);
-
pos.at({{0u}}) = -2.1;
pos.at({{1u}}) = 0.0;
}
@@ -62,7 +54,8 @@ SAW_TEST("No Collision Spheroid 2D"){
bool have_collided = lbm::broadphase_collision_check<sch::T,2u>(part_a,part_b);
SAW_EXPECT(not have_collided, "Particles shouldn't collide");
}
-
+*/
+/*
SAW_TEST("Collision Spheroid 2D"){
using namespace kel;
@@ -95,7 +88,8 @@ SAW_TEST("Collision Spheroid 2D"){
bool have_collided = lbm::broadphase_collision_check<sch::T,2u>(part_a,part_b);
SAW_EXPECT(have_collided, "Particles should collide");
}
-
+*/
+/*
SAW_TEST("Moving particles 2D"){
using namespace kel;
@@ -149,7 +143,7 @@ SAW_TEST("Moving particles 2D"){
SAW_EXPECT(has_collided, "Expecting collision within those steps");
}
-
+*/
SAW_TEST("Particle Matrix Rotation"){
using namespace kel;
@@ -158,20 +152,14 @@ SAW_TEST("Particle Matrix Rotation"){
auto& body = part_a.template get<"rigid_body">();
auto& pos = body.template get<"position">();
auto& pos_old = body.template get<"position_old">();
- auto& coll = part_a.template get<"collision">();
- auto& radius = coll.template get<"radius">();
auto& acc = body.template get<"acceleration">();
- radius.at({}).set(1.0);
-
pos.at({{0u}}) = -5.0;
pos.at({{1u}}) = 0.2;
pos_old = pos;
}
-
-
-
}
+/*
SAW_TEST("Particle Collision Impulse"){
using namespace kel;
@@ -210,8 +198,9 @@ SAW_TEST("Particle Collision Impulse"){
acc.at({{0u}}) = -0.1;
}
}
-
+*/
/*
+
SAW_TEST("Minor Test for mask"){
using namespace kel;
generated by cgit v1.2.3 (git 2.25.1) at 2026-03-27 00:27:13 +0000