def setup_class(self):
"""set up some initial values for tests"""
self.T_e = 1000 * u.eV
self.n_e = 2e13 / u.cm**3
self.ion = "D +1"
self.m_i = particle_mass(self.ion)
self.Z = charge_number(self.ion)
self.T_i = self.T_e
self.n_i = self.n_e / self.Z
self.B = 0.01 * u.T
self.coulomb_log_val_ei = 17
self.coulomb_log_val_ii = 17
self.hall_e = None
self.hall_i = None
self.V_ei = None
self.V_ii = None
self.mu = m_e / self.m_i
self.theta = self.T_e / self.T_i
self.model = "Braginskii"
self.field_orientation = "all"
with pytest.warns(RelativityWarning):
self.ct = ClassicalTransport(
T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
Z=self.Z,
B=self.B,
model=self.model,
field_orientation=self.field_orientation,
coulomb_log_ei=self.coulomb_log_val_ei,
coulomb_log_ii=self.coulomb_log_val_ii,
V_ei=self.V_ei,
V_ii=self.V_ii,
hall_e=self.hall_e,
hall_i=self.hall_i,
mu=self.mu,
theta=self.theta,
)
self.ct_wrapper = ClassicalTransport(
T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
Z=self.Z,
B=self.B,
model=self.model,
field_orientation=self.field_orientation,
mu=self.mu,
theta=self.theta,
)
self.all_variables = self.ct.all_variables
def test_spitzer_vs_formulary(self):
"""Spitzer resistivity should agree with approx. in NRL formulary"""
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(
T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model="spitzer",
field_orientation="perp",
)
alpha_spitzer_perp_NRL = (
1.03e-4
* ct2.Z
* ct2.coulomb_log_ei
* (ct2.T_e.to(u.eV, equivalencies=u.temperature_energy())).value
** (-3 / 2)
* u.Ohm
* u.m
)
testTrue = np.isclose(
ct2.resistivity.value, alpha_spitzer_perp_NRL.value, rtol=2e-2
)
errStr = (
f"Resistivity should be close to "
f"{alpha_spitzer_perp_NRL.value} "
f"and not {ct2.resistivity.value}."
)
assert testTrue, errStr
def test_hall_calc(self):
"""if no hall parameters are input, they should be calculated"""
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion)
hall_i = Hall_parameter(ct2.n_i, ct2.T_i, ct2.B, ct2.ion, ct2.ion,
ct2.coulomb_log_ii, ct2.V_ii)
hall_e = Hall_parameter(
ct2.n_e,
ct2.T_e,
ct2.B,
ct2.ion,
ct2.e_particle,
ct2.coulomb_log_ei,
ct2.V_ei,
)
testTrue = hall_i == ct2.hall_i
errStr = f"Ion hall parameter should be {hall_i} and not {ct2.hall_i}."
assert testTrue, errStr
testTrue = hall_e == ct2.hall_e
errStr = f"Electron hall parameter should be {hall_e} and not {ct2.hall_e}."
assert testTrue, errStr
def test_invalid_field(self):
with pytest.raises(ValueError):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
field_orientation='to the left')
def test_invalid_model(self):
with pytest.raises(ValueError):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model="standard")
def test_coulomb_log_errors(self):
"""should raise PhysicsError if coulomb log is < 1"""
with pytest.raises(PhysicsError), pytest.warns(CouplingWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
coulomb_log_ii=0.3)
with pytest.raises(PhysicsError), pytest.warns(CouplingWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
coulomb_log_ei=0.3)
def test_coulomb_log_warnings(self):
"""should warn CouplingWarning if coulomb log is near 1"""
with pytest.warns(CouplingWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
coulomb_log_ii=1.3)
with pytest.warns(CouplingWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
coulomb_log_ei=1.3)
def test_particle_mass(self):
"""should raise ValueError if particle mass not found"""
with pytest.raises(ValueError):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion='empty moment',
Z=1)
def test_Z_checks(self):
"""should raise ValueError if Z is negative"""
with pytest.raises(ValueError):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
Z=-1)
def test_particle_charge_state(self):
"""should raise ValueError if particle charge state not found"""
with pytest.raises(InvalidParticleError):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion='empty moment',
m_i=m_p)
def test_resistivity_by_model(self, model, expected):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model=model)
testTrue = np.isclose(ct2.resistivity,
expected,
atol=1e-6 * u.Ohm * u.m)
errStr = (f"Resistivity in {model} model should be "
f"close to {expected} and not {ct2.resistivity}.")
assert testTrue, errStr
def test_ion_thermal_conductivity_by_model(self, model, expected):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model=model)
testTrue = np.allclose(ct2.ion_thermal_conductivity,
expected,
atol=1e-6 * u.W / (u.K * u.m))
errStr = (f"Ion thermal conductivity in {model} model "
f"should be close to {expected} and not "
f"{ct2.ion_thermal_conductivity}.")
assert testTrue, errStr
def test_ion_viscosity_by_model(self, model, expected):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model=model)
testTrue = np.allclose(ct2.ion_viscosity,
expected,
atol=1e-6 * u.Pa * u.s)
errStr = (
f"Electron viscosity in {model} model should be close to "
f"{expected} and not {ct2.electron_viscosity}")
assert testTrue, errStr
def test_thermoelectric_conductivity_by_model(self, model, expected):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model=model)
testTrue = np.isclose(ct2.thermoelectric_conductivity,
expected,
atol=1e-6 * u.s / u.s)
errStr = (f"Thermoelectric conductivity in {model} model "
f"should be close {expected} and not "
f"{ct2.thermoelectric_conductivity}.")
assert testTrue, errStr
def test_precalculated_parameters(self):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
hall_i=0,
hall_e=0)
testTrue = np.isclose(ct2.resistivity,
2.8184954e-8 * u.Ohm * u.m,
atol=1e-6 * u.Ohm * u.m)
errStr = (
f"Resistivity should be close to "
f"{2.8184954e-8 * u.Ohm * u.m} and not {ct2.resistivity}.")
assert testTrue, errStr
def test_number_of_returns(self, model, attr_name, field_orientation,
expected):
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
model=model,
field_orientation=field_orientation)
attr_to_test = getattr(ct2, attr_name)
testTrue = np.size(attr_to_test) == expected
errStr = (f"{attr_name} in {model} model returns "
f"{np.size(attr_to_test)} objects. "
f"Expected to return {expected} objects.")
assert testTrue, errStr
def test_coulomb_log_calc(self):
"""if no coulomb logs are input, they should be calculated"""
with pytest.warns(RelativityWarning):
ct2 = ClassicalTransport(T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion)
cl_ii = Coulomb_logarithm(self.T_i, self.n_e, [self.ion, self.ion],
self.V_ii)
cl_ei = Coulomb_logarithm(self.T_e, self.n_e, ["e", self.ion],
self.V_ei)
testTrue = cl_ii == ct2.coulomb_log_ii
errStr = (f"Ion-ion coulomb logarithm should be {cl_ii} "
f"and not {ct2.coulomb_log_ii}.")
assert testTrue, errStr
testTrue = cl_ei == ct2.coulomb_log_ei
errStr = (f"Electron-ion coulomb logarithm should be {cl_ei} "
f"and not {ct2.coulomb_log_ei}.")
assert testTrue, errStr