PoissonFFT Class Reference

adc_cpp 0.3.0 Model-free C++23 core for coupled hyperbolic-elliptic systems on adaptive (AMR) meshes, with MPI and GPU (Kokkos) backends

• pops
• PoissonFFT

Public Member Functions | List of all members

pops::PoissonFFT Class Reference

#include <poisson_fft.hpp>

Collaboration diagram for pops::PoissonFFT:

Public Member Functions
	PoissonFFT (int Nx, int Ny, double Lx, double Ly, bool spectral=false)
	spectral: false (default) = DISCRETE 5-point stencil eigenvalue (consistent with the transport gradients, bit-identical to the historical behavior).
int	ny_local () const
int	nx () const
int	y_begin () const
void	solve (const std::vector< double > &rho_local, std::vector< double > &phi_local)

Constructor & Destructor Documentation

◆ PoissonFFT()

pops::PoissonFFT::PoissonFFT ( int  Nx, int  Ny, double  Lx, double  Ly, bool  spectral = false  )

inline

spectral: false (default) = DISCRETE 5-point stencil eigenvalue (consistent with the transport gradients, bit-identical to the historical behavior).

true = CONTINUOUS symbol lambda(k) = -(kx^2 + ky^2) with signed frequencies k in [0..N/2-1, -N/2..-1] * (2pi/L) – exactly the convention of reference spectral solvers (e.g. poisson_fft.m of RIEMOM2D); the solution is then the SPECTRAL Poisson (exact on sinusoids), which differs from the discrete stencil by O(h^2).

Member Function Documentation

◆ nx()

int pops::PoissonFFT::nx ( ) const

inline

◆ ny_local()

int pops::PoissonFFT::ny_local ( ) const

inline

◆ solve()

void pops::PoissonFFT::solve ( const std::vector< double > &  rho_local, std::vector< double > &  phi_local  )

inline

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◆ y_begin()

int pops::PoissonFFT::y_begin ( ) const

inline

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The documentation for this class was generated from the following file:

• include/pops/numerics/elliptic/poisson/poisson_fft.hpp

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