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/* Copyright 2020 Neil Zaim
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include "RhoMaximum.H"
#include "Diagnostics/ComputeDiagFunctors/RhoFunctor.H"
#include "Diagnostics/ReducedDiags/ReducedDiags.H"
#include "Particles/MultiParticleContainer.H"
#include "Particles/WarpXParticleContainer.H"
#include "Utils/TextMsg.H"
#include "WarpX.H"
#include <AMReX_BoxArray.H>
#include <AMReX_DistributionMapping.H>
#include <AMReX_IntVect.H>
#include <AMReX_MultiFab.H>
#include <AMReX_ParallelDescriptor.H>
#include <AMReX_ParmParse.H>
#include <AMReX_REAL.H>
#include <algorithm>
#include <ostream>
#include <vector>
using namespace amrex::literals;
// constructor
RhoMaximum::RhoMaximum (std::string rd_name)
: ReducedDiags{rd_name}
{
// RZ coordinate is not working
#if (defined WARPX_DIM_RZ)
WARPX_ALWAYS_ASSERT_WITH_MESSAGE(false,
"RhoMaximum reduced diagnostics does not work for RZ coordinate.");
#endif
// read number of levels
int nLevel = 0;
amrex::ParmParse pp_amr("amr");
pp_amr.query("max_level", nLevel);
nLevel += 1;
m_rho_functors.resize(nLevel);
// We do not use coarsening in the functors for this diag.
const amrex::IntVect crse_ratio = amrex::IntVect(1);
// Initialize functors for the total charge density
for (int lev = 0; lev < nLevel; ++lev)
{
m_rho_functors[lev].push_back(std::make_unique<RhoFunctor>(lev, crse_ratio));
}
// get MultiParticleContainer class object
const auto & mypc = WarpX::GetInstance().GetPartContainer();
// get number of species (int)
const auto nSpecies = mypc.nSpecies();
// A vector to store the indices of charges species in mypc
amrex::Vector<int> indices_charged_species;
// number of charged species
int n_charged_species = 0;
for (int i = 0; i < nSpecies; ++i)
{
// Only charged species are relevant for this diag
if (mypc.GetParticleContainer(i).getCharge() != 0.0_rt)
{
indices_charged_species.push_back(i);
n_charged_species += 1;
for (int lev = 0; lev < nLevel; ++lev)
{
// Initialize functors for the charge density of each charged species
m_rho_functors[lev].push_back(std::make_unique<RhoFunctor>(lev, crse_ratio, i));
}
}
}
// get species names (std::vector<std::string>)
const auto species_names = mypc.GetSpeciesNames();
// Min and max of total rho + max of |rho| for each species
const int noutputs_per_level = 2+n_charged_species;
m_data.resize(static_cast<std::size_t>(nLevel*noutputs_per_level), 0.0_rt);
if (amrex::ParallelDescriptor::IOProcessor())
{
if ( m_IsNotRestart )
{
// open file
std::ofstream ofs{m_path + m_rd_name + "." + m_extension, std::ofstream::out};
// write header row
int c = 0;
ofs << "#";
ofs << "[" << c++ << "]step()";
ofs << m_sep;
ofs << "[" << c++ << "]time(s)";
for (int lev = 0; lev < nLevel; ++lev)
{
ofs << m_sep;
ofs << "[" << c++ << "]max_rho_lev" + std::to_string(lev) + " (C/m^3)";
ofs << m_sep;
ofs << "[" << c++ << "]min_rho_lev" + std::to_string(lev) + " (C/m^3)";
for (int i = 0; i < n_charged_species; ++i)
{
ofs << m_sep;
ofs << "[" << c++ << "]max_" + species_names[indices_charged_species[i]]
+ "_|rho|_lev" + std::to_string(lev) + " (C/m^3)";
}
}
ofs << std::endl;
// close file
ofs.close();
}
}
}
// end constructor
// function that computes maximum charge density values
void RhoMaximum::ComputeDiags (int step)
{
// Judge if the diags should be done
if (!m_intervals.contains(step+1)) { return; }
// get a reference to WarpX instance
auto & warpx = WarpX::GetInstance();
// get number of levels
const auto nLevel = warpx.finestLevel() + 1;
const int n_charged_species = m_rho_functors[0].size() - 1;
// Min and max of total rho + max of |rho| for each species
const int noutputs_per_level = 2+n_charged_species;
// loop over refinement levels
for (int lev = 0; lev < nLevel; ++lev)
{
// Declare a temporary MultiFAB to store the charge densities.
amrex::BoxArray ba = warpx.boxArray(lev);
amrex::DistributionMapping dmap = warpx.DistributionMap(lev);
constexpr int ncomp = 1;
constexpr int ngrow = 0;
amrex::MultiFab mf_temp(ba, dmap, ncomp, ngrow);
// Fill temporary MultiFAB with total charge density
constexpr int idx_total_rho_functor = 0;
constexpr int idx_first_species_functor = 1;
constexpr int icomp = 0;
constexpr int i_buffer = 0;
m_rho_functors[lev][idx_total_rho_functor]->operator()(mf_temp, icomp, i_buffer);
constexpr int idx_max_rho_data = 0;
constexpr int idx_min_rho_data = 1;
constexpr int idx_first_species_data = 2;
// Fill output array with min and max of total rho
m_data[lev*noutputs_per_level + idx_max_rho_data] = mf_temp.max(icomp);
m_data[lev*noutputs_per_level + idx_min_rho_data] = mf_temp.min(icomp);
// Loop over all charged species
for (int i = 0; i < n_charged_species; ++i)
{
// Fill temporary MultiFAB with the species charge density
m_rho_functors[lev][idx_first_species_functor+i]->operator()(mf_temp, icomp, i_buffer);
// Fill output array with max |rho| of species
m_data[lev*noutputs_per_level + idx_first_species_data + i] = mf_temp.norm0();
}
}
// end loop over refinement levels
/* m_data now contains up-to-date values for:
* [max(rho), min(rho), max(|rho_charged_species1|), max(|rho_charged_species2|), ...] */
}
// end void RhoMaximum::ComputeDiags
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