def test_Plasma3D_add_magnetostatics():
r"""Function to test add_magnetostatic function
"""
dipole = magnetostatics.MagneticDipole(
np.array([0, 0, 1]) * u.A * u.m * u.m,
np.array([0, 0, 0]) * u.m)
cw = magnetostatics.CircularWire(np.array([0, 0, 1]),
np.array([0, 0, 0]) * u.m, 1 * u.m,
1 * u.A)
gw_cw = cw.to_GeneralWire()
iw = magnetostatics.InfiniteStraightWire(np.array([0, 1, 0]),
np.array([0, 0, 0]) * u.m,
1 * u.A)
plasma = plasma3d.Plasma3D(domain_x=np.linspace(-2, 2, 30) * u.m,
domain_y=np.linspace(0, 0, 1) * u.m,
domain_z=np.linspace(-2, 2, 20) * u.m)
plasma.add_magnetostatic(dipole, cw, gw_cw, iw)
An example of using PlasmaPy's `Magnetostatic` class in `physics` subpackage.
"""
from plasmapy.formulary import magnetostatics
from plasmapy.classes.sources import Plasma3D
import numpy as np
import astropy.units as u
import matplotlib.pyplot as plt
############################################################
# Some common magnetostatic fields can be generated and added to a plasma object.
# A dipole
dipole = magnetostatics.MagneticDipole(
np.array([0, 0, 1]) * u.A * u.m * u.m,
np.array([0, 0, 0]) * u.m)
print(dipole)
############################################################
# initialize a a plasma, where the magnetic field will be calculated on
plasma = Plasma3D(domain_x=np.linspace(-2, 2, 30) * u.m,
domain_y=np.linspace(0, 0, 1) * u.m,
domain_z=np.linspace(-2, 2, 20) * u.m)
############################################################
# add the dipole field to it
plasma.add_magnetostatic(dipole)
X, Z = plasma.grid[0, :, 0, :], plasma.grid[2, :, 0, :]