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Remove 'constant ionization source' #240

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Aug 9, 2024
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Remove 'constant ionization source' #240

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23 changes: 0 additions & 23 deletions moment_kinetics/debug_test/harrisonthompson.jl
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76 changes: 0 additions & 76 deletions moment_kinetics/debug_test/harrisonthompson_inputs.jl
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1 change: 0 additions & 1 deletion moment_kinetics/debug_test/runtests.jl
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Expand Up @@ -8,7 +8,6 @@ function runtests()
include(joinpath(@__DIR__, "sound_wave_tests.jl"))
include(joinpath(@__DIR__, "fokker_planck_collisions_tests.jl"))
include(joinpath(@__DIR__, "wall_bc_tests.jl"))
include(joinpath(@__DIR__, "harrisonthompson.jl"))
#include(joinpath(@__DIR__, "mms_tests.jl"))
include(joinpath(@__DIR__, "restart_interpolation_tests.jl"))
include(joinpath(@__DIR__, "recycling_fraction_tests.jl"))
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3 changes: 0 additions & 3 deletions moment_kinetics/src/input_structs.jl
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Expand Up @@ -115,7 +115,6 @@ mutable struct advance_info
neutral_ionization_collisions::Bool
ion_ionization_collisions_1V::Bool
neutral_ionization_collisions_1V::Bool
ionization_source::Bool
krook_collisions_ii::Bool
mxwl_diff_collisions_ii::Bool
mxwl_diff_collisions_nn::Bool
Expand Down Expand Up @@ -458,8 +457,6 @@ struct collisions_input
ionization_electron::mk_float
# ionization energy cost
ionization_energy::mk_float
# if constant_ionization_rate = true, use an ionization term that is constant in z
constant_ionization_rate::Bool
# electron-ion collision frequency
nu_ei::mk_float
# struct of parameters for the Krook operator
Expand Down
56 changes: 0 additions & 56 deletions moment_kinetics/src/ionization.jl
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Expand Up @@ -6,66 +6,10 @@ export ion_ionization_collisions_1V!
export neutral_ionization_collisions_1V!
export ion_ionization_collisions_3V!
export neutral_ionization_collisions_3V!
export constant_ionization_source!

using ..interpolation: interpolate_to_grid_vpa!
using ..looping

"""
"""

function constant_ionization_source!(f_out, fvec_in, vpa, vperp, z, r, moments,
composition, collisions, dt)
@boundscheck vpa.n == size(f_out,1) || throw(BoundsError(f_out))
@boundscheck vperp.n == size(f_out,2) || throw(BoundsError(f_out))
@boundscheck z.n == size(f_out,3) || throw(BoundsError(f_out))
@boundscheck r.n == size(f_out,4) || throw(BoundsError(f_out))
@boundscheck composition.n_ion_species == size(f_out,5) || throw(BoundsError(f_out))

begin_s_r_z_region()

# Oddly the test in test/harrisonthompson.jl matches the analitical
# solution (which assumes width=0.0) better with width=0.5 than with,
# e.g., width=0.15. Possibly narrower widths would require more vpa
# resolution, which then causes crashes due to overshoots giving
# negative f??
width = 0.5
vperpwidth = 0.5
rwidth = 0.5
if vperp.n > 1
vperpprefac = 1.0/vperpwidth^2
else
vperpprefac = 1.0
end
# loop below relies on vperp[1] = 0 when vperp.n = 1
@loop_s_r is ir begin
rfac = exp( - (r.grid[ir]/rwidth)^2)

@loop_z iz begin
if moments.evolve_ppar && moments.evolve_upar
@. vpa.scratch = vpa.grid / moments.vth[iz] + fvec_in.upar[iz]
prefactor = moments.vth[iz] / fvec_in.dens[iz]
elseif moments.evolve_ppar
@. vpa.scratch = vpa.grid / moments.vth[iz]
prefactor = moments.vth[iz] / fvec_in.dens[iz]
elseif moments.evolve_upar
@. vpa.scratch = vpa.grid + fvec_in.upar[iz]
prefactor = 1.0 / fvec_in.dens[iz]
elseif moments.evolve_density
@. vpa.scratch = vpa.grid
prefactor = 1.0 / fvec_in.dens[iz]
else
@. vpa.scratch = vpa.grid
prefactor = 1.0
end
@loop_vperp_vpa ivperp ivpa begin
vperpfac = vperpprefac*exp( - (vperp.grid[ivperp]/vperpwidth)^2)
f_out[ivpa,ivperp,iz,ir,is] += dt*rfac*vperpfac*collisions.ionization/width*prefactor*exp(-(vpa.scratch[ivpa]/width)^2)
end
end
end
end

function ion_ionization_collisions_1V!(f_out, fvec_in, vz, vpa, vperp, z, r, vz_spectral,
moments, composition, collisions, dt)
# This routine assumes a 1D model with:
Expand Down
7 changes: 2 additions & 5 deletions moment_kinetics/src/moment_kinetics_input.jl
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Expand Up @@ -190,7 +190,6 @@ function mk_input(scan_input=Dict(); save_inputs_to_txt=false, ignore_MPI=true)
ionization = get(scan_input, "ionization_frequency", charge_exchange)
ionization_electron = get(scan_input, "electron_ionization_frequency", ionization)
ionization_energy = get(scan_input, "ionization_energy", 0.0)
constant_ionization_rate = get(scan_input, "constant_ionization_rate", false)
nu_ei = get(scan_input, "nu_ei", 0.0)
# set up krook collision inputs
krook_input = setup_krook_collisions_input(scan_input, reference_params)
Expand All @@ -202,10 +201,8 @@ function mk_input(scan_input=Dict(); save_inputs_to_txt=false, ignore_MPI=true)
# for the collisions outputs itself a struct of the type of collision, which
# is a substruct of the overall collisions_input struct.
collisions = collisions_input(charge_exchange, charge_exchange_electron, ionization,
ionization_electron, ionization_energy,
constant_ionization_rate,
nu_ei, krook_input,
fkpl_input, mxwl_diff_input)
ionization_electron, ionization_energy, nu_ei,
krook_input, fkpl_input, mxwl_diff_input)

# parameters related to the time stepping
timestepping_section = set_defaults_and_check_section!(
Expand Down
20 changes: 3 additions & 17 deletions moment_kinetics/src/time_advance.jl
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Expand Up @@ -48,8 +48,7 @@ using ..charge_exchange: ion_charge_exchange_collisions_1V!,
neutral_charge_exchange_collisions_3V!
using ..electron_kinetic_equation: update_electron_pdf!, implicit_electron_advance!
using ..ionization: ion_ionization_collisions_1V!, neutral_ionization_collisions_1V!,
ion_ionization_collisions_3V!, neutral_ionization_collisions_3V!,
constant_ionization_source!
ion_ionization_collisions_3V!, neutral_ionization_collisions_3V!
using ..krook_collisions: krook_collisions!
using ..maxwell_diffusion: ion_vpa_maxwell_diffusion!, neutral_vz_maxwell_diffusion!
using ..external_sources
Expand Down Expand Up @@ -1106,7 +1105,6 @@ function setup_advance_flags(moments, composition, t_params, collisions,
advance_neutral_ionization = false
advance_ion_ionization_1V = false
advance_neutral_ionization_1V = false
advance_ionization_source = false
advance_krook_collisions_ii = false
advance_maxwell_diffusion_ii = false
advance_maxwell_diffusion_nn = false
Expand Down Expand Up @@ -1188,10 +1186,6 @@ function setup_advance_flags(moments, composition, t_params, collisions,
end
end
end
# exception for the case where ions are evolved alone but sourced by ionization
if collisions.ionization > 0.0 && collisions.constant_ionization_rate && !t_params.implicit_ion_advance
advance_ionization_source = true
end
# set flags for krook and maxwell diffusion collisions, and negative coefficient
# in both cases (as usual) will mean not employing that operator (flag remains false)
if collisions.krook.nuii0 > 0.0
Expand Down Expand Up @@ -1283,8 +1277,7 @@ function setup_advance_flags(moments, composition, t_params, collisions,
advance_neutral_vz_advection, advance_ion_cx, advance_neutral_cx,
advance_ion_cx_1V, advance_neutral_cx_1V, advance_ion_ionization,
advance_neutral_ionization, advance_ion_ionization_1V,
advance_neutral_ionization_1V, advance_ionization_source,
advance_krook_collisions_ii,
advance_neutral_ionization_1V, advance_krook_collisions_ii,
advance_maxwell_diffusion_ii, advance_maxwell_diffusion_nn,
explicit_weakform_fp_collisions,
advance_external_source, advance_ion_numerical_dissipation,
Expand Down Expand Up @@ -1320,7 +1313,6 @@ function setup_implicit_advance_flags(moments, composition, t_params, collisions
advance_neutral_ionization = false
advance_ion_ionization_1V = false
advance_neutral_ionization_1V = false
advance_ionization_source = false
advance_krook_collisions_ii = false
advance_maxwell_diffusion_ii = false
advance_maxwell_diffusion_nn = false
Expand Down Expand Up @@ -1376,7 +1368,6 @@ function setup_implicit_advance_flags(moments, composition, t_params, collisions
* "vpa.n=$(vpa.n), vz.n=$(vz.n)")
end
end
advance_ionization_source = collisions.ionization > 0.0 && collisions.constant_ionization_rate
advance_krook_collisions_ii = collisions.krook.nuii0 > 0.0
advance_external_source = external_source_settings.ion.active
advance_ion_numerical_dissipation = true
Expand Down Expand Up @@ -1418,8 +1409,7 @@ function setup_implicit_advance_flags(moments, composition, t_params, collisions
advance_neutral_vz_advection, advance_ion_cx, advance_neutral_cx,
advance_ion_cx_1V, advance_neutral_cx_1V, advance_ion_ionization,
advance_neutral_ionization, advance_ion_ionization_1V,
advance_neutral_ionization_1V,
advance_ionization_source, advance_krook_collisions_ii,
advance_neutral_ionization_1V, advance_krook_collisions_ii,
advance_maxwell_diffusion_ii, advance_maxwell_diffusion_nn,
explicit_weakform_fp_collisions,
advance_external_source, advance_ion_numerical_dissipation,
Expand Down Expand Up @@ -3342,10 +3332,6 @@ function euler_time_advance!(fvec_out, fvec_in, pdf, fields, moments,
neutral_ionization_collisions_3V!(fvec_out.pdf_neutral, fvec_in, composition, vz,
vr, vzeta, vpa, vperp, z, r, collisions, dt)
end
if advance.ionization_source
constant_ionization_source!(fvec_out.pdf, fvec_in, vpa, vperp, z, r, moments,
composition, collisions, dt)
end

# Add Krook collision operator for ions
if advance.krook_collisions_ii
Expand Down
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