import pytest
from sfepy import data_dir
import sfepy.base.testing as tst
filename_mesh = data_dir + '/meshes/2d/square_unit_tri.mesh'
material_1 = {
'name' : 'coef',
'values' : {
'val' : 1.0,
},
}
material_2 = {
'name' : 'm',
'values' : {
'K' : [[1.0, 0.0], [0.0, 1.0]],
},
}
field_1 = {
'name' : 'a_harmonic_field',
'dtype' : 'real',
'shape' : 'scalar',
'region' : 'Omega',
'approx_order' : 2,
}
variable_1 = {
'name' : 't',
'kind' : 'unknown field',
'field' : 'a_harmonic_field',
'order' : 0,
}
variable_2 = {
'name' : 's',
'kind' : 'test field',
'field' : 'a_harmonic_field',
'dual' : 't',
}
region_1000 = {
'name' : 'Omega',
'select' : 'all',
}
region_1 = {
'name' : 'Left',
'select' : 'vertices in (x < -0.499)',
'kind' : 'facet',
}
region_2 = {
'name' : 'Right',
'select' : 'vertices in (x > 0.499)',
'kind' : 'facet',
}
region_3 = {
'name' : 'Gamma',
'select' : 'vertices of surface',
'kind' : 'facet',
}
ebc_1 = {
'name' : 't_left',
'region' : 'Left',
'dofs' : {'t.0' : 5.0},
}
ebc_2 = {
'name' : 't_right',
'region' : 'Right',
'dofs' : {'t.0' : 0.0},
}
integral_1 = {
'name' : 'i',
'order' : 2,
}
equations = {
'Temperature' : """dw_laplace.i.Omega(coef.val, s, t) = 0"""
}
solution = {
't' : '- 5.0 * (x - 0.5)',
}
solver_0 = {
'name' : 'ls',
'kind' : 'ls.scipy_direct',
}
solver_1 = {
'name' : 'newton',
'kind' : 'nls.newton',
'i_max' : 1,
'eps_a' : 1e-10,
}
lin_min, lin_max = 0.0, 2.0
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def linear(bc, ts, coor, which):
vals = coor[:,which]
min_val, max_val = vals.min(), vals.max()
vals = (vals - min_val) / (max_val - min_val) * (lin_max - lin_min) + lin_min
return vals
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def linear_x(bc, ts, coor):
return linear(bc, ts, coor, 0)
[docs]
def linear_y(bc, ts, coor):
return linear(bc, ts, coor, 1)
[docs]
def linear_z(bc, ts, coor):
return linear(bc, ts, coor, 2)
[docs]
@pytest.fixture(scope='module')
def data():
import sys
from sfepy.applications import solve_pde
from sfepy.base.conf import ProblemConf
from sfepy.base.base import Struct
conf = ProblemConf.from_dict(globals(), sys.modules[__name__])
problem, state = solve_pde(conf, save_results=False)
return Struct(problem=problem, state=state)
[docs]
def test_solution(data):
problem = data.problem
sol = problem.conf.solution
vec = data.state()
variables = problem.get_variables()
ok = True
for var_name, expression in sol.items():
coor = variables[var_name].field.get_coor()
ana_sol = tst.eval_coor_expression(expression, coor)
num_sol = variables.get_vec_part(vec, var_name)
ret = tst.compare_vectors(ana_sol, num_sol,
label1='analytical %s' % var_name,
label2='numerical %s' % var_name)
if not ret:
tst.report('variable %s: failed' % var_name)
ok = ok and ret
assert ok
[docs]
def test_boundary_fluxes(data, output_dir):
import os.path as op
from sfepy.linalg import rotation_matrix2d
from sfepy.discrete import Material
problem = data.problem
angles = [0, 30, 45]
region_names = ['Left', 'Right', 'Gamma']
values = [5.0, -5.0, 0.0]
variables = problem.get_variables()
get_state = variables.get_vec_part
state = data.state.copy()
problem.time_update(ebcs={}, epbcs={})
state.apply_ebc()
nls = problem.get_nls()
aux = nls.fun(state())
field = variables['t'].field
conf_m = problem.conf.get_item_by_name('materials', 'm')
m = Material.from_conf(conf_m, problem.functions)
name = op.join(output_dir,
op.split(problem.domain.mesh.name)[1] + '_%02d.mesh')
orig_coors = problem.get_mesh_coors().copy()
ok = True
for ia, angle in enumerate(angles):
tst.report('%d: mesh rotation %d degrees' % (ia, angle))
problem.domain.mesh.transform_coors(rotation_matrix2d(angle),
ref_coors = orig_coors)
problem.set_mesh_coors(problem.domain.mesh.coors,
update_fields=True)
problem.domain.mesh.write(name % angle, io='auto')
for ii, region_name in enumerate(region_names):
flux_term = 'ev_surface_flux.i.%s(m.K, t)' % region_name
val1 = problem.evaluate(flux_term, t=variables['t'], m=m)
rvec = get_state(aux, 't', True)
reg = problem.domain.regions[region_name]
nods = field.get_dofs_in_region(reg, merge=True)
val2 = rvec[nods].sum() # Assume 1 dof per node.
ok = ok and ((abs(val1 - values[ii]) < 1e-10) and
(abs(val2 - values[ii]) < 1e-10))
tst.report(' %d. %s: %e == %e == %e'
% (ii, region_name, val1, val2, values[ii]))
# Restore original coordinates.
problem.domain.mesh.transform_coors(rotation_matrix2d(0),
ref_coors=orig_coors)
problem.set_mesh_coors(problem.domain.mesh.coors,
update_fields=True)
assert ok