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Add input parameter zero_electric_field to permit testing of scaling … #269

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Add input parameter zero_electric_field to permit testing of scaling … #269

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9 changes: 9 additions & 0 deletions moment_kinetics/src/em_fields.jl
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Expand Up @@ -156,6 +156,15 @@ function update_phi!(fields, fvec, vperp, z, r, composition, collisions, moments
z_spectral,z)
end
end

# zero out electric field if user wishes to remove acceleration physics
zeroE = composition.zero_electric_field
if zeroE
@loop_r_z ir iz begin
fields.Ez[iz,ir] = 0.0
fields.Er[iz,ir] = 0.0
end
end

# get gyroaveraged field arrays for distribution function advance
gkions = composition.gyrokinetic_ions
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2 changes: 2 additions & 0 deletions moment_kinetics/src/input_structs.jl
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Expand Up @@ -279,6 +279,8 @@ Base.@kwdef struct species_composition
# gyrokinetic_ions = true -> use gyroaveraged fields at fixed guiding centre and moments of the pdf computed at fixed r
# gyrokinetic_ions = false -> use drift kinetic approximation
gyrokinetic_ions::Bool
# zero_electric_field = true -> force Ez = Er = 0
zero_electric_field::Bool
# array of structs of parameters for each ion species
ion::Vector{ion_species_parameters}
# array of structs of parameters for each neutral species
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4 changes: 3 additions & 1 deletion moment_kinetics/src/species_input.jl
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Expand Up @@ -46,7 +46,9 @@ function get_species_input(toml_input)
recycling_fraction = 1.0,
# gyrokinetic_ions = True -> use gyroaveraged fields at fixed guiding centre and moments of the pdf computed at fixed r
# gyrokinetic_ions = False -> use drift kinetic approximation
gyrokinetic_ions = false)
gyrokinetic_ions = false,
# if zero_electric_field = true, set Ez = Er = 0.
zero_electric_field = false)

nspec_ion = composition_section["n_ion_species"]
nspec_neutral = composition_section["n_neutral_species"]
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