Select Git revision
-
Stéphane Del Pino authored
These functions return the number of items (template parameter)
Stéphane Del Pino authoredThese functions return the number of items (template parameter)
AcousticSolver.hpp 11.64 KiB
#ifndef ACOUSTIC_SOLVER_HPP
#define ACOUSTIC_SOLVER_HPP
#include <Kokkos_Core.hpp>
#include <rang.hpp>
#include <BlockPerfectGas.hpp>
#include <TinyVector.hpp>
#include <TinyMatrix.hpp>
#include <Mesh.hpp>
#include <MeshData.hpp>
#include <FiniteVolumesEulerUnknowns.hpp>
#include <BoundaryCondition.hpp>
template<typename MeshData>
class AcousticSolver
{
typedef typename MeshData::MeshType MeshType;
typedef FiniteVolumesEulerUnknowns<MeshData> UnknownsType;
MeshData& m_mesh_data;
const MeshType& m_mesh;
const typename MeshType::Connectivity& m_connectivity;
const std::vector<BoundaryConditionHandler>& m_boundary_condition_list;
constexpr static size_t dimension = MeshType::dimension;
typedef TinyVector<dimension> Rd;
typedef TinyMatrix<dimension> Rdd;
private:
struct ReduceMin
{
private:
const Kokkos::View<const double*> x_;
public:
typedef Kokkos::View<const double*>::non_const_value_type value_type;
ReduceMin(const Kokkos::View<const double*>& x) : x_ (x) {}
typedef Kokkos::View<const double*>::size_type size_type;
KOKKOS_INLINE_FUNCTION
void operator() (const size_type i, value_type& update) const
{
if (x_(i) < update) {
update = x_(i);
}
}
KOKKOS_INLINE_FUNCTION
void join (volatile value_type& dst,
const volatile value_type& src) const
{
if (src < dst) {
dst = src;
}
}
KOKKOS_INLINE_FUNCTION void
init (value_type& dst) const
{ // The identity under max is -Inf.
dst= Kokkos::reduction_identity<value_type>::min();
}
};
KOKKOS_INLINE_FUNCTION
const Kokkos::View<const double*>
computeRhoCj(const Kokkos::View<const double*>& rhoj,
const Kokkos::View<const double*>& cj)
{
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j) {
m_rhocj[j] = rhoj[j]*cj[j];
});
return m_rhocj;
}
KOKKOS_INLINE_FUNCTION
const Kokkos::View<const Rdd**>
computeAjr(const Kokkos::View<const double*>& rhocj,
const Kokkos::View<const double**>& ljr,
const Kokkos::View<const Rd**>& njr) {
const Kokkos::View<const unsigned short*> cell_nb_nodes
= m_connectivity.cellNbNodes();
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j) {
for (int r=0; r<cell_nb_nodes[j]; ++r) {
m_Ajr(j,r) = tensorProduct((rhocj(j)*ljr(j,r))*njr(j,r), njr(j,r));
}
});
return m_Ajr;
}
KOKKOS_INLINE_FUNCTION
const Kokkos::View<const Rdd*>
computeAr(const Kokkos::View<const Rdd**>& Ajr) {
const Kokkos::View<const unsigned int**> node_cells = m_connectivity.nodeCells();
const Kokkos::View<const unsigned short**> node_cell_local_node = m_connectivity.nodeCellLocalNode();
const Kokkos::View<const unsigned short*> node_nb_cells = m_connectivity.nodeNbCells();
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r) {
Rdd sum = zero;
for (int j=0; j<node_nb_cells(r); ++j) {
const int J = node_cells(r,j);
const int R = node_cell_local_node(r,j);
sum += Ajr(J,R);
}
m_Ar(r) = sum;
});
return m_Ar;
}
KOKKOS_INLINE_FUNCTION
const Kokkos::View<const Rd*>
computeBr(const Kokkos::View<const Rdd**>& Ajr,
const Kokkos::View<const Rd**>& Cjr,
const Kokkos::View<const Rd*>& uj,
const Kokkos::View<const double*>& pj) {
const Kokkos::View<const unsigned int**>& node_cells = m_connectivity.nodeCells();
const Kokkos::View<const unsigned short**>& node_cell_local_node = m_connectivity.nodeCellLocalNode();
const Kokkos::View<const unsigned short*>& node_nb_cells = m_connectivity.nodeNbCells();
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r) {
Rd& br = m_br(r);
br = zero;
for (int j=0; j<node_nb_cells(r); ++j) {
const int J = node_cells(r,j);
const int R = node_cell_local_node(r,j);
br += Ajr(J,R)*uj(J) + pj(J)*Cjr(J,R);
}
});
return m_br;
}
void applyBoundaryConditions()
{
for (const auto& handler : m_boundary_condition_list) {
switch (handler.boundaryCondition().type()) {
case BoundaryCondition::normal_velocity: {
std::cerr << "normal_velocity NIY\n";
std::exit(0);
break;
}
case BoundaryCondition::velocity: {
std::cerr << "velocity NIY\n";
std::exit(0);
break;
}
case BoundaryCondition::pressure: {
const PressureBoundaryCondition& pressure_bc
= dynamic_cast<const PressureBoundaryCondition&>(handler.boundaryCondition());
const Kokkos::View<const unsigned int**> face_cells
= m_connectivity.faceCells();
const Kokkos::View<const unsigned short**> face_cell_local_face
= m_connectivity.faceCellLocalFace();
const Kokkos::View<const Rd**> Cjr
= m_mesh_data.Cjr();
Kokkos::parallel_for(pressure_bc.numberOfFaces(), KOKKOS_LAMBDA(const int& l_number) {
// quite ugly: node/faces are melt in a bad way... at least works in 1d...
const int l = pressure_bc.faceList()[l_number];
assert(m_connectivity.faceNbCells()[l] == 1);
const unsigned int j = face_cells(l,0);
const unsigned int L = face_cell_local_face(l,0);
m_br(l) -= pressure_bc.value()*Cjr(j,L);
});
break;
}
case BoundaryCondition::symmetry: {
const SymmetryBoundaryCondition<dimension>& symmetry_bc
= dynamic_cast<const SymmetryBoundaryCondition<dimension>&>(handler.boundaryCondition());
const Rd& n = symmetry_bc.outgoingNormal();
const Rdd I = identity;
const Rdd nxn = tensorProduct(n,n);
const Rdd P = I-nxn;
Kokkos::parallel_for(symmetry_bc.numberOfNodes(), KOKKOS_LAMBDA(const int& r_number) {
const int r = symmetry_bc.nodeList()[r_number];
assert(m_connectivity.nodeNbCells()[r] == 1);
m_Ar(r) = P*m_Ar(r)*P + nxn;
m_br(r) = P*m_br(r);
});
break;
}
}
}
}
Kokkos::View<Rd*>
computeUr(const Kokkos::View<const Rdd*>& Ar,
const Kokkos::View<const Rd*>& br) {
inverse(Ar, m_inv_Ar);
const Kokkos::View<const Rdd*> invAr = m_inv_Ar;
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r) {
m_ur[r]=invAr(r)*br(r);
});
return m_ur;
}
Kokkos::View<Rd**>
computeFjr(const Kokkos::View<const Rdd**>& Ajr,
const Kokkos::View<const Rd*>& ur,
const Kokkos::View<const Rd**>& Cjr,
const Kokkos::View<const Rd*>& uj,
const Kokkos::View<const double*>& pj) {
const Kokkos::View<const unsigned int**>& cell_nodes = m_connectivity.cellNodes();
const Kokkos::View<const unsigned short*> cell_nb_nodes
= m_connectivity.cellNbNodes();
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j) {
for (int r=0; r<cell_nb_nodes[j]; ++r) {
m_Fjr(j,r) = Ajr(j,r)*(uj(j)-ur(cell_nodes(j,r)))+pj(j)*Cjr(j,r);
}
});
return m_Fjr;
}
void inverse(const Kokkos::View<const Rdd*>& A,
Kokkos::View<Rdd*>& inv_A) const {
if constexpr (dimension==1) {
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r) {
inv_A(r) = Rdd{1./(A(r)(0,0))};
});
}
else {
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r) {
const Rdd& M = A(r);
double det = M(0,0)*M(1,1)-M(1,0)*M(0,1);
double inv_det = 1./det;
inv_A(r) = inv_det*Rdd(M(1,1),-M(0,1),
-M(1,0), M(0,0));
});
}
}
void inverse(const Kokkos::View<const double*>& x,
Kokkos::View<double*>& inv_x) const {
Kokkos::parallel_for(x.size(), KOKKOS_LAMBDA(const int& r) {
inv_x(r) = 1./x(r);
});
}
KOKKOS_INLINE_FUNCTION
void computeExplicitFluxes(const Kokkos::View<const Rd*>& xr,
const Kokkos::View<const Rd*>& xj,
const Kokkos::View<const double*>& rhoj,
const Kokkos::View<const Rd*>& uj,
const Kokkos::View<const double*>& pj,
const Kokkos::View<const double*>& cj,
const Kokkos::View<const double*>& Vj,
const Kokkos::View<const Rd**>& Cjr,
const Kokkos::View<const double**>& ljr,
const Kokkos::View<const Rd**>& njr) {
const Kokkos::View<const double*> rhocj = computeRhoCj(rhoj, cj);
const Kokkos::View<const Rdd**> Ajr = computeAjr(rhocj, ljr, njr);
const Kokkos::View<const Rdd*> Ar = computeAr(Ajr);
const Kokkos::View<const Rd*> br = computeBr(Ajr, Cjr, uj, pj);
this->applyBoundaryConditions();
Kokkos::View<Rd*> ur = m_ur;
Kokkos::View<Rd**> Fjr = m_Fjr;
ur = computeUr(Ar, br);
Fjr = computeFjr(Ajr, ur, Cjr, uj, pj);
}
Kokkos::View<Rd*> m_br;
Kokkos::View<Rdd**> m_Ajr;
Kokkos::View<Rdd*> m_Ar;
Kokkos::View<Rdd*> m_inv_Ar;
Kokkos::View<Rd**> m_Fjr;
Kokkos::View<Rd*> m_ur;
Kokkos::View<double*> m_rhocj;
Kokkos::View<double*> m_Vj_over_cj;
public:
AcousticSolver(MeshData& mesh_data,
UnknownsType& unknowns,
const std::vector<BoundaryConditionHandler>& bc_list)
: m_mesh_data(mesh_data),
m_mesh(mesh_data.mesh()),
m_connectivity(m_mesh.connectivity()),
m_boundary_condition_list(bc_list),
m_br("br", m_mesh.numberOfNodes()),
m_Ajr("Ajr", m_mesh.numberOfCells(), m_connectivity.maxNbNodePerCell()),
m_Ar("Ar", m_mesh.numberOfNodes()),
m_inv_Ar("inv_Ar", m_mesh.numberOfNodes()),
m_Fjr("Fjr", m_mesh.numberOfCells(), m_connectivity.maxNbNodePerCell()),
m_ur("ur", m_mesh.numberOfNodes()),
m_rhocj("rho_c", m_mesh.numberOfCells()),
m_Vj_over_cj("Vj_over_cj", m_mesh.numberOfCells())
{
;
}
KOKKOS_INLINE_FUNCTION
double acoustic_dt(const Kokkos::View<const double*>& Vj,
const Kokkos::View<const double*>& cj) const {
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j){
m_Vj_over_cj[j] = Vj[j]/cj[j];
});
double dt = std::numeric_limits<double>::max();
Kokkos::parallel_reduce(m_mesh.numberOfCells(), ReduceMin(m_Vj_over_cj), dt);
return dt;
}
void computeNextStep(const double& t, const double& dt,
UnknownsType& unknowns)
{
Kokkos::View<double*> rhoj = unknowns.rhoj();
Kokkos::View<Rd*> uj = unknowns.uj();
Kokkos::View<double*> Ej = unknowns.Ej();
Kokkos::View<double*> ej = unknowns.ej();
Kokkos::View<double*> pj = unknowns.pj();
Kokkos::View<double*> gammaj = unknowns.gammaj();
Kokkos::View<double*> cj = unknowns.cj();
const Kokkos::View<const Rd*> xj = m_mesh_data.xj();
const Kokkos::View<const double*> Vj = m_mesh_data.Vj();
const Kokkos::View<const Rd**> Cjr = m_mesh_data.Cjr();
const Kokkos::View<const double**> ljr = m_mesh_data.ljr();
const Kokkos::View<const Rd**> njr = m_mesh_data.njr();
Kokkos::View<Rd*> xr = m_mesh.xr();
computeExplicitFluxes(xr, xj, rhoj, uj, pj, cj, Vj, Cjr, ljr, njr);
const Kokkos::View<const Rd**> Fjr = m_Fjr;
const Kokkos::View<const Rd*> ur = m_ur;
const Kokkos::View<const unsigned short*> cell_nb_nodes
= m_connectivity.cellNbNodes();
const Kokkos::View<const unsigned int**>& cell_nodes
= m_connectivity.cellNodes();
const Kokkos::View<const double*> inv_mj = unknowns.invMj();
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j) {
Rd momentum_fluxes = zero;
double energy_fluxes = 0;
for (int R=0; R<cell_nb_nodes[j]; ++R) {
const int r=cell_nodes(j,R);
momentum_fluxes += Fjr(j,R);
energy_fluxes += (Fjr(j,R), ur[r]);
}
uj[j] -= (dt*inv_mj[j]) * momentum_fluxes;
Ej[j] -= (dt*inv_mj[j]) * energy_fluxes;
});
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j) {
ej[j] = Ej[j] - 0.5 * (uj[j],uj[j]);
});
Kokkos::parallel_for(m_mesh.numberOfNodes(), KOKKOS_LAMBDA(const int& r){
xr[r] += dt*ur[r];
});
m_mesh_data.updateAllData();
const Kokkos::View<const double*> mj = unknowns.mj();
Kokkos::parallel_for(m_mesh.numberOfCells(), KOKKOS_LAMBDA(const int& j){
rhoj[j] = mj[j]/Vj[j];
});
}
};
#endif // ACOUSTIC_SOLVER_HPP