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/* Copyright 2019-2020 David Grote
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include "SpectralKSpaceRZ.H"
#include "SpectralSolverRZ.H"
#include "SpectralAlgorithms/PsatdAlgorithmRZ.H"
/* \brief Initialize the spectral Maxwell solver
*
* This function selects the spectral algorithm to be used, allocates the
* corresponding coefficients for the discretized field update equation,
* and prepares the structures that store the fields in spectral space.
*
* \param n_rz_azimuthal_modes Number of azimuthal modes
* \param norder_z Order of accuracy of the spatial derivatives along z
* \param nodal Whether the solver is applied to a nodal or staggered grid
* \param dx Cell size along each dimension
* \param dt Time step
* \param pml Whether the boxes in which the solver is applied are PML boxes
* PML is not supported.
*/
SpectralSolverRZ::SpectralSolverRZ(amrex::BoxArray const & realspace_ba,
amrex::DistributionMapping const & dm,
int const n_rz_azimuthal_modes,
int const norder_z, bool const nodal,
amrex::RealVect const dx, amrex::Real const dt,
int const lev,
bool const pml )
{
// Initialize all structures using the same distribution mapping dm
// - The k space object contains info about the size of
// the spectral space corresponding to each box in `realspace_ba`,
// as well as the value of the corresponding k coordinates.
SpectralKSpaceRZ k_space(realspace_ba, dm, dx);
// - Select the algorithm depending on the input parameters
// Initialize the corresponding coefficients over k space
// PML is not supported.
algorithm = std::unique_ptr<PsatdAlgorithmRZ>(
new PsatdAlgorithmRZ(k_space, dm, n_rz_azimuthal_modes, norder_z, nodal, dt));
// - Initialize arrays for fields in spectral space + FFT plans
field_data = SpectralFieldDataRZ(realspace_ba, k_space, dm,
algorithm->getRequiredNumberOfFields(),
n_rz_azimuthal_modes, lev);
};
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