Exchange guard cells with the electrostatic solver #4713
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| #!/usr/bin/env python3 | ||
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| # Copyright 2024, Remi Lehe | ||
| # | ||
| # This file is part of WarpX. | ||
| # | ||
| # License: BSD-3-Clause-LBNL | ||
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| # This script tests the conservation of energy for a thermal plasma with periodic boundary. | ||
| # Here, we use energy-converving gather and an electrostatic solver. The energy | ||
| # is not expected to be exactly conserved, but it is expected to be better conserved | ||
| # than other gathering scheme. This tests checks that the energy does not increase by | ||
| # more than 0.3% over the duration of the simulatoin. | ||
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| import os | ||
| import sys | ||
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| import numpy as np | ||
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| sys.path.insert(1, '../../../../warpx/Regression/Checksum/') | ||
| import checksumAPI | ||
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| # this will be the name of the plot file | ||
| fn = sys.argv[1] | ||
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| # Get energy as a function of time, from reduced diagnostics | ||
| EFdata = np.genfromtxt('./diags/reducedfiles/EF.txt') # Field energy | ||
| EPdata = np.genfromtxt('./diags/reducedfiles/EP.txt') # Particle energy | ||
| field_energy = EFdata[:,2] | ||
| particle_energy = EPdata[:,2] | ||
| E = field_energy + particle_energy | ||
| print(abs(E-E[0])/E[0]) | ||
| # Check that the energy is conserved to 0.3% | ||
| assert np.all( abs(E-E[0])/E[0] < 0.003 ) | ||
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| # Checksum test | ||
| test_name = os.path.split(os.getcwd())[1] | ||
| checksumAPI.evaluate_checksum(test_name, fn) |
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| ################################# | ||
| ####### GENERAL PARAMETERS ###### | ||
| ################################# | ||
| max_step = 500 | ||
| amr.n_cell = 8 8 | ||
| amr.max_level = 0 | ||
| geometry.dims = 2 | ||
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| warpx.do_electrostatic = labframe | ||
| algo.field_gathering = energy-conserving | ||
| algo.particle_shape = 2 | ||
| warpx.use_filter = 0 | ||
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| ################################# | ||
| ############ CONSTANTS ############# | ||
| ################################# | ||
| my_constants.n0 = 1.e30 # plasma density, m^-3 | ||
| my_constants.Ti = 100. # ion temperature, eV | ||
| my_constants.Te = 100. # electron temperature, eV | ||
| my_constants.wpe = q_e*sqrt(n0/(m_e*epsilon0)) # electron plasma frequency, radians/s | ||
| my_constants.de0 = clight/wpe # skin depth, m | ||
| my_constants.dt = ( 0.2 )/wpe # time step size, s | ||
| warpx.const_dt = dt | ||
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| ################################# | ||
| ####### GENERAL PARAMETERS ###### | ||
| ################################# | ||
| geometry.dims = 2 | ||
| geometry.prob_lo = 0.0 0.0 | ||
| geometry.prob_hi = 10.*de0 10.*de0 | ||
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There was a problem hiding this comment. These parameters could be placed in the "general parameters" section above. |
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| warpx.serialize_initial_conditions = 1 | ||
| warpx.verbose = 1 | ||
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| ################################# | ||
| ###### BOUNDARY CONDITIONS ###### | ||
| ################################# | ||
| boundary.field_lo = periodic periodic | ||
| boundary.field_hi = periodic periodic | ||
| boundary.particle_lo = periodic periodic | ||
| boundary.particle_hi = periodic periodic | ||
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| ################################# | ||
| ############ PLASMA ############# | ||
| ################################# | ||
| particles.species_names = electrons protons | ||
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| electrons.species_type = electron | ||
| electrons.injection_style = "NUniformPerCell" | ||
| electrons.num_particles_per_cell_each_dim = 2 2 | ||
| electrons.profile = constant | ||
| electrons.density = n0 | ||
| electrons.momentum_distribution_type = gaussian | ||
| electrons.ux_th = sqrt(Te*q_e/m_e)/clight | ||
| electrons.uy_th = sqrt(Te*q_e/m_e)/clight | ||
| electrons.uz_th = sqrt(Te*q_e/m_e)/clight | ||
| electrons.xmin = 0 | ||
| electrons.xmax = 10.*de0 | ||
| electrons.zmin = 0 | ||
| electrons.zmax =10.*de0 | ||
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| protons.species_type = proton | ||
| protons.injection_style = "NUniformPerCell" | ||
| protons.num_particles_per_cell_each_dim = 2 2 | ||
| protons.profile = constant | ||
| protons.density = n0 | ||
| protons.momentum_distribution_type = gaussian | ||
| protons.ux_th = sqrt(Ti*q_e/m_p)/clight | ||
| protons.uy_th = sqrt(Ti*q_e/m_p)/clight | ||
| protons.uz_th = sqrt(Ti*q_e/m_p)/clight | ||
| protons.xmin = 0 | ||
| protons.xmax = 10.*de0 | ||
| protons.zmin = 0 | ||
| protons.zmax =10.*de0 | ||
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| diagnostics.diags_names = diag1 | ||
| diag1.intervals = 500 | ||
| diag1.diag_type = Full | ||
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| warpx.reduced_diags_names = EP EF | ||
| EP.type = ParticleEnergy | ||
| EP.intervals = 100 | ||
| EF.type = FieldEnergy | ||
| EF.intervals =100 | ||
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| "Ez": 1.309938057448976e+17, | ||
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| "rho_beam2": 7.969079911431987e+16, | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,17 @@ | ||
| { | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,17 @@ | ||
| { | ||
| "lev=0": { | ||
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| "particle_weight": 6212.501525878906 | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,17 @@ | ||
| { | ||
| "lev=0": { | ||
| "Er": 0.11588944816311227, | ||
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| "electron": { | ||
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I think that these parameters should be under "numerics"