def atest_mpfa_coupling_2d_1d_bottom_top_dir(self):
"""
Grid: 2 x 2 matrix + 2 x 1 fracture from left to right.
Dirichlet + no-flow, blocking fracture.
"""
f = np.array([[0, 1], [.5, .5]])
gb = meshing.cart_grid([f], [1, 2], **{"physdims": [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = mpfa.Mpfa(physics="flow")
gb.add_node_props(["param"])
a = 1e-2
for g, d in gb:
param = Parameters(g)
aperture = np.ones(g.num_cells) * np.power(a, gb.dim_max() - g.dim)
param.set_aperture(aperture)
p = tensor.SecondOrderTensor(
3,
np.ones(g.num_cells) * np.power(1e-3, g.dim < gb.dim_max()))
param.set_tensor("flow", p)
bound_faces = g.tags["domain_boundary_faces"].nonzero()[0]
bound_face_centers = g.face_centers[:, bound_faces]
top = bound_face_centers[1, :] > 1 - tol
bottom = bound_face_centers[1, :] < tol
labels = np.array(["neu"] * bound_faces.size)
labels[np.logical_or(top, bottom)] = ["dir"]
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[np.logical_or(top, bottom)]
bc_val[bc_dir] = g.face_centers[1, bc_dir]
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d["param"] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known = np.array([
[4.19047619, 0., -0.19047619],
[0., 4.19047619, -0.19047619],
[-0.19047619, -0.19047619, 0.38095238],
])
rhs_known = np.array([0., 4., 0.])
rtol = 1e-6
atol = rtol
self.assertTrue(np.allclose(A.todense(), A_known, rtol, atol))
self.assertTrue(np.allclose(rhs, rhs_known, rtol, atol))
def test_1d_elimination_3d_2d_1d(self):
"""
3d case with a single 1d grid.
"""
f1 = np.array([[0, 1, 1, 0], [0, 0, 1, 1], [.5, .5, .5, .5]])
f2 = np.array([[.5, .5, .5, .5], [0, 1, 1, 0], [0, 0, 1, 1]])
gb = meshing.cart_grid([f1, f2], [2, 2, 2], **{'physdims': [1, 1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
aperture = np.ones(g.num_cells) * np.power(a, gb.dim_max() - g.dim)
param.set_aperture(aperture)
p = tensor.SecondOrder(
3,
np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
left = bound_face_centers[0, :] > 1 - tol
right = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[np.logical_or(left, right)] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[np.logical_or(left, right)]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
p = sps.linalg.spsolve(A, rhs)
p_cond, _, _, _ = condensation.solve_static_condensation(\
A, rhs, gb, dim=1)
solver_coupler.split(gb, "pressure", p)
solver_coupler.split(gb, "p_cond", p_cond)
tol = 1e-5
assert ((np.amax(np.absolute(p - p_cond))) < tol)
assert (np.sum(
error.error_L2(g, d['pressure'], d['p_cond'])
for g, d in gb) < tol)
def test_mpfa_coupling_2d_1d_bottom_top_dir_neu(self):
"""
Grid: 1 x 2 cells in matrix + 1 cell in the fracture from left to right.
Dirichlet + inflow + no-flow, blocking fracture.
"""
f = np.array([[0, 1], [.5, .5]])
gb = meshing.cart_grid([f], [1, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = mpfa.Mpfa(physics='flow')
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells) * a_dim
param.set_aperture(aperture)
p = tensor.SecondOrder(
3,
np.ones(g.num_cells) * np.power(1e-3, g.dim < gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
top = bound_face_centers[1, :] > 1 - tol
bottom = bound_face_centers[1, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[bottom] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[bottom]
bc_neu = bound_faces[top]
bc_val[bc_dir] = g.face_centers[1, bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu] * a_dim
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known = np.array([[4.19047619, 0., -0.19047619],
[0., 0.19047619, -0.19047619],
[-0.19047619, -0.19047619, 0.38095238]])
rhs_known = np.array([0, 1, 0])
rtol = 1e-6
atol = rtol
assert np.allclose(A.todense(), A_known, rtol, atol)
assert np.allclose(rhs, rhs_known, rtol, atol)
def test_mpfa_coupling_2d_1d_left_right_dir(self):
"""
Grid: 2 x 2 cells in matrix + 2 cells in the fracture from left to right.
Dirichlet + no-flow, conductive fracture.
"""
f = np.array([[0, 1], [.5, .5]])
gb = meshing.cart_grid([f], [2, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = mpfa.Mpfa(physics='flow')
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
aperture = np.ones(g.num_cells) * np.power(a, gb.dim_max() - g.dim)
param.set_aperture(aperture)
p = tensor.SecondOrder(
3,
np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
left = bound_face_centers[0, :] > 1 - tol
right = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[np.logical_or(left, right)] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[np.logical_or(left, right)]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known = np.array([[4.99996, -1., 0., 0., 0., -1.99996],
[-1., 4.99996, 0., 0., -1.99996, 0.],
[0., 0., 4.99996, -1., 0., -1.99996],
[0., 0., -1., 4.99996, -1.99996, 0.],
[0., -1.99996, 0., -1.99996, 63.99992, -20.],
[-1.99996, 0., -1.99996, 0., -20., 63.99992]])
rhs_known = np.array([0., 2., 0., 2., 40., 0.])
rtol = 1e-6
atol = rtol
assert np.allclose(A.todense(), A_known, rtol, atol)
assert np.allclose(rhs, rhs_known, rtol, atol)
def __init__(self, physics='flow'):
self.physics = physics
self.discr = tpfa.Tpfa(self.physics)
self.discr_ndof = self.discr.ndof
self.coupling_conditions = tpfa.TpfaCoupling(self.discr)
tp = tpfa.Tpfa(self.physics)
mp = mpfa.Mpfa(self.physics)
def discr_fct(g, d): return mp.matrix_rhs(g, d) if g.dim < 3 \
else tp.matrix_rhs(g, d)
kwargs = {'discr_fct': discr_fct}
self.solver = Coupler(self.discr, self.coupling_conditions, **kwargs)
def test_0d_elimination_2d_1d_cross(self):
"""
Simplest case possible:
2d case with two fractures intersecting in a single 0d grid
at the center of the domain.
"""
f1 = np.array([[0, 1], [.5, .5]])
f2 = np.array([[.5, .5], [0, 1]])
gb = meshing.cart_grid([f1, f2], [2, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells) * a_dim
param.set_aperture(aperture)
kxx = np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max())
p = tensor.SecondOrderTensor(3, kxx, kyy=kxx, kzz=kxx)
param.set_tensor('flow', p)
bound_faces = g.tags['domain_boundary_faces'].nonzero()[0]
if bound_faces.size != 0:
bound_face_centers = g.face_centers[:, bound_faces]
right = bound_face_centers[0, :] > 1 - tol
left = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[right] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[right]
bc_neu = bound_faces[left]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu] * a_dim
param.set_bc(solver,
bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
else:
param.set_bc("flow",
bc.BoundaryCondition(g, np.empty(0), np.empty(0)))
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
p = sps.linalg.spsolve(A, rhs)
p_cond, _, _, _ = condensation.solve_static_condensation(A,
rhs,
gb,
dim=0)
solver_coupler.split(gb, 'pressure', p)
solver_coupler.split(gb, "p_cond", p_cond)
tol = 1e-10
assert ((np.amax(np.absolute(p - p_cond))) < tol)
assert (np.sum(
error.error_L2(g, d['pressure'], d['p_cond'])
for g, d in gb) < tol)
def test_0d_elimination_3d_2d_1d_0d(self):
"""
3d case with a single 0d grid.
"""
f1 = np.array([[0, 1, 1, 0], [0, 0, 1, 1], [.5, .5, .5, .5]])
f2 = np.array([[.5, .5, .5, .5], [0, 1, 1, 0], [0, 0, 1, 1]])
f3 = np.array([[0, 1, 1, 0], [.5, .5, .5, .5], [0, 0, 1, 1]])
gb = meshing.cart_grid([f1, f2, f3], [2, 2, 2],
**{'physdims': [1, 1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
cell_centers1 = np.array([[0.25, 0.75, 0.25, 0.75],
[0.25, 0.25, 0.75, 0.75],
[0.5, 0.5, 0.5, 0.5]])
cell_centers2 = np.array([[0.5, 0.5, 0.5, 0.5],
[0.25, 0.25, 0.75, 0.75],
[0.75, 0.25, 0.75, 0.25]])
cell_centers3 = np.array([[0.25, 0.75, 0.25,
0.75], [0.5, 0.5, 0.5, 0.5],
[0.25, 0.25, 0.75, 0.75]])
cell_centers4 = np.array([[0.5], [0.25], [0.5]])
cell_centers5 = np.array([[0.5], [0.75], [0.5]])
cell_centers6 = np.array([[0.75], [0.5], [0.5]])
cell_centers7 = np.array([[0.25], [0.5], [0.5]])
cell_centers8 = np.array([[0.5], [0.5], [0.25]])
cell_centers9 = np.array([[0.5], [0.5], [0.75]])
for g, d in gb:
if np.allclose(g.cell_centers[:, 0], cell_centers1[:, 0]):
d['node_number'] = 1
elif np.allclose(g.cell_centers[:, 0], cell_centers2[:, 0]):
d['node_number'] = 2
elif np.allclose(g.cell_centers[:, 0], cell_centers3[:, 0]):
d['node_number'] = 3
elif np.allclose(g.cell_centers[:, 0], cell_centers4[:, 0]):
d['node_number'] = 4
elif np.allclose(g.cell_centers[:, 0], cell_centers5[:, 0]):
d['node_number'] = 5
elif np.allclose(g.cell_centers[:, 0], cell_centers6[:, 0]):
d['node_number'] = 6
elif np.allclose(g.cell_centers[:, 0], cell_centers7[:, 0]):
d['node_number'] = 7
elif np.allclose(g.cell_centers[:, 0], cell_centers8[:, 0]):
d['node_number'] = 8
elif np.allclose(g.cell_centers[:, 0], cell_centers9[:, 0]):
d['node_number'] = 9
else:
pass
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
aperture = np.ones(g.num_cells) * np.power(a, gb.dim_max() - g.dim)
param.set_aperture(aperture)
p = tensor.SecondOrderTensor(
3,
np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.tags['domain_boundary_faces'].nonzero()[0]
if bound_faces.size != 0:
bound_face_centers = g.face_centers[:, bound_faces]
left = bound_face_centers[0, :] > 1 - tol
right = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[np.logical_or(left, right)] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[np.logical_or(left, right)]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
param.set_bc(solver,
bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
else:
param.set_bc("flow",
bc.BoundaryCondition(g, np.empty(0), np.empty(0)))
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
p = sps.linalg.spsolve(A, rhs)
p_cond, _, _, _ = condensation.solve_static_condensation(A,
rhs,
gb,
dim=0)
solver_coupler.split(gb, 'pressure', p)
solver_coupler.split(gb, "p_cond", p_cond)
tol = 1e-10
assert ((np.amax(np.absolute(p - p_cond))) < tol)
assert (np.sum(
error.error_L2(g, d['pressure'], d['p_cond'])
for g, d in gb) < tol)
def test_tpfa_coupling_3d_2d_1d_0d_dir(self):
f1 = np.array([[ 0, 1, 1, 0],
[ 0, 0, 1, 1],
[.5, .5, .5, .5]])
f2 = np.array([[.5, .5, .5, .5],
[ 0, 1, 1, 0],
[ 0, 0, 1, 1]])
f3 = np.array([[ 0, 1, 1, 0],
[.5, .5, .5, .5],
[ 0, 0, 1, 1]])
gb = meshing.cart_grid([f1, f2, f3], [2, 2, 2],
**{'physdims': [1, 1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
# Remove flag for dual
cell_centers1 = np.array([[ 0.25 , 0.75 , 0.25 , 0.75],
[ 0.25 , 0.25 , 0.75 , 0.75],
[ 0.5 , 0.5 , 0.5 , 0.5 ]])
cell_centers2 = np.array([[ 0.5 , 0.5 , 0.5 , 0.5 ],
[ 0.25 , 0.25 , 0.75 , 0.75],
[ 0.75 , 0.25 , 0.75 , 0.25]])
cell_centers3 = np.array([[ 0.25 , 0.75 , 0.25 , 0.75],
[ 0.5 , 0.5 , 0.5 , 0.5 ],
[ 0.25 , 0.25 , 0.75 , 0.75]])
cell_centers4 = np.array([[ 0.5 ], [ 0.25], [ 0.5 ]])
cell_centers5 = np.array([[ 0.5 ], [ 0.75], [ 0.5 ]])
cell_centers6 = np.array([[ 0.75], [ 0.5 ], [ 0.5 ]])
cell_centers7 = np.array([[ 0.25], [ 0.5 ], [ 0.5 ]])
cell_centers8 = np.array([[ 0.5 ], [ 0.5 ], [ 0.25]])
cell_centers9 = np.array([[ 0.5 ], [ 0.5 ], [ 0.75]])
for g, d in gb:
if np.allclose(g.cell_centers[:, 0], cell_centers1[:, 0]):
d['node_number'] = 1
elif np.allclose(g.cell_centers[:, 0], cell_centers2[:, 0]):
d['node_number'] = 2
elif np.allclose(g.cell_centers[:, 0], cell_centers3[:, 0]):
d['node_number'] = 3
elif np.allclose(g.cell_centers[:, 0], cell_centers4[:, 0]):
d['node_number'] = 4
elif np.allclose(g.cell_centers[:, 0], cell_centers5[:, 0]):
d['node_number'] = 5
elif np.allclose(g.cell_centers[:, 0], cell_centers6[:, 0]):
d['node_number'] = 6
elif np.allclose(g.cell_centers[:, 0], cell_centers7[:, 0]):
d['node_number'] = 7
elif np.allclose(g.cell_centers[:, 0], cell_centers8[:, 0]):
d['node_number'] = 8
elif np.allclose(g.cell_centers[:, 0], cell_centers9[:, 0]):
d['node_number'] = 9
else:
pass
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
aperture = np.ones(g.num_cells)*np.power(a, gb.dim_max() - g.dim)
param.set_aperture(aperture)
p = tensor.SecondOrder(3,np.ones(g.num_cells)* np.power(1e3, g.dim<gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
left = bound_face_centers[0, :] > 1 - tol
right = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[np.logical_or(left, right)] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[np.logical_or(left, right)]
bc_val[bc_dir] = g.face_centers[0,bc_dir]
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known, rhs_known, p_known = \
matrix_rhs_pressure_for_test_tpfa_coupling_3d_2d_1d_0d()
p = sps.linalg.spsolve(A, rhs)
rtol = 1e-6
atol = rtol
assert np.allclose(A.todense(), A_known, rtol, atol)
assert np.allclose(rhs, rhs_known, rtol, atol)
assert np.allclose(p, p_known, rtol, atol)
def test_tpfa_coupling_2d_1d_left_right_cross_dir_neu(self):
f1 = np.array([[0, 2],
[.5, .5]])
f2 = np.array([[.5, .5],
[0, 2]])
gb = meshing.cart_grid( [f1, f2], [2, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
# Enforce node orderning because of Python 3.5 and 2.7.
# Don't do it in general.
cell_centers_1 = np.array([[ 7.50000000e-01, 2.500000000e-01],
[ 5.00000000e-01, 5.00000000e-01],
[ -5.55111512e-17, 5.55111512e-17]])
cell_centers_2 = np.array([[ 5.00000000e-01, 5.00000000e-01],
[ 7.50000000e-01, 2.500000000e-01],
[ -5.55111512e-17, 5.55111512e-17]])
for g, d in gb:
if g.dim == 1:
if np.allclose(g.cell_centers, cell_centers_1):
d['node_number'] = 1
elif np.allclose(g.cell_centers, cell_centers_2):
d['node_number'] = 2
else:
raise ValueError('Grid not found')
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells)*a_dim
param.set_aperture(aperture)
kxx = np.ones(g.num_cells) * np.power(1e3, g.dim<gb.dim_max())
#print(kxx, 'dim', g.dim)
p = tensor.SecondOrder(3,kxx,kyy=kxx,kzz=kxx)
#print(p.perm)
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
right = bound_face_centers[0, :] > 1 - tol
left = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[right] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[right]
bc_neu = bound_faces[left]
bc_val[bc_dir] = g.face_centers[0,bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu]*a_dim
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known, rhs_known = matrix_rhs_for_2d_1d_cross()
rtol = 1e-6
atol = rtol
assert np.allclose(A.todense(), A_known, rtol, atol)
assert np.allclose(rhs, rhs_known, rtol, atol)
def test_tpfa_coupling_2d_1d_left_right_dir_neu(self):
"""
Grid: 2 x 2 cells in matrix + 2 cells in the fracture from left to right.
Dirichlet + inflow + no-flow, conductive fracture.
Tests pressure solution as well as matrix and rhs.
"""
f = np.array([[0, 1],
[.5, .5]])
gb = meshing.cart_grid( [f], [2, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = tpfa.Tpfa(physics='flow')
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells)*a_dim
param.set_aperture(aperture)
p = tensor.SecondOrder(3,np.ones(g.num_cells)* np.power(1e3, g.dim<gb.dim_max()))
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
right = bound_face_centers[0, :] > 1 - tol
left = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[right] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[right]
bc_neu = bound_faces[left]
bc_val[bc_dir] = g.face_centers[0,bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu]*a_dim
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
A_known = np.array(\
[[ 2.99996, -1. , 0. , 0. , 0. , -1.99996],
[ -1. , 4.99996, 0. , 0. , -1.99996, 0. ],
[ 0. , 0. , 2.99996, -1. , 0. , -1.99996],
[ 0. , 0. , -1. , 4.99996, -1.99996, 0. ],
[ 0. , -1.99996, 0. , -1.99996, 63.99992, -20. ],
[ -1.99996, 0. , -1.99996, 0. , -20. , 23.99992]] )
rhs_known = np.array([ 5.00000000e-01, 2.00000000e+00, 5.00000000e-01,
2.00000000e+00, 4.00000000e+01, 1.00000000e-02])
p_known = np.array([ 1.21984244, 1.05198918, 1.21984244, 1.05198918,
1.02005108, 1.05376576])
p = sps.linalg.spsolve(A, rhs)
rtol = 1e-6
atol = rtol
assert np.allclose(A.todense(), A_known, rtol, atol)
assert np.allclose(rhs, rhs_known, rtol, atol)
assert np.allclose(p, p_known, rtol, atol)
def test_0d_elimination_two_0d_grids(self):
"""
2d case involving two 0d grids.
"""
f1 = np.array([[0, 1], [.5, .5]])
f2 = np.array([[.5, .5], [0, 1]])
f3 = np.array([[.25, .25], [0, 1]])
gb = meshing.cart_grid([f1, f2, f3], [4, 2], **{'physdims': [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(['param'])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells) * a_dim
param.set_aperture(aperture)
kxx = np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max())
#print(kxx, 'dim', g.dim)
p = tensor.SecondOrder(3, kxx, kyy=kxx, kzz=kxx)
# print(p.perm)
param.set_tensor('flow', p)
bound_faces = g.get_boundary_faces()
bound_face_centers = g.face_centers[:, bound_faces]
right = bound_face_centers[0, :] > 1 - tol
left = bound_face_centers[0, :] < tol
labels = np.array(['neu'] * bound_faces.size)
labels[right] = ['dir']
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[right]
bc_neu = bound_faces[left]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu] * a_dim
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
d['param'] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
p = sps.linalg.spsolve(A, rhs)
p_cond, _, _, _ = condensation.solve_static_condensation(A,
rhs,
gb,
dim=0)
solver_coupler.split(gb, 'pressure', p)
solver_coupler.split(gb, "p_cond", p_cond)
tol = 1e-10
assert ((np.amax(np.absolute(p - p_cond))) < tol)
assert (np.sum(
error.error_L2(g, d['pressure'], d['p_cond'])
for g, d in gb) < tol)
def atest_0d_elimination_two_0d_grids(self):
"""
2d case involving two 0d grids.
"""
f1 = np.array([[0, 1], [.5, .5]])
f2 = np.array([[.5, .5], [0, 1]])
f3 = np.array([[.25, .25], [0, 1]])
gb = meshing.cart_grid([f1, f2, f3], [4, 2], **{"physdims": [1, 1]})
gb.compute_geometry()
gb.assign_node_ordering()
tol = 1e-3
solver = tpfa.Tpfa()
gb.add_node_props(["param"])
a = 1e-2
for g, d in gb:
param = Parameters(g)
a_dim = np.power(a, gb.dim_max() - g.dim)
aperture = np.ones(g.num_cells) * a_dim
param.set_aperture(aperture)
kxx = np.ones(g.num_cells) * np.power(1e3, g.dim < gb.dim_max())
p = tensor.SecondOrderTensor(3, kxx, kyy=kxx, kzz=kxx)
param.set_tensor("flow", p)
bound_faces = g.tags["domain_boundary_faces"].nonzero()[0]
if bound_faces.size != 0:
bound_face_centers = g.face_centers[:, bound_faces]
right = bound_face_centers[0, :] > 1 - tol
left = bound_face_centers[0, :] < tol
labels = np.array(["neu"] * bound_faces.size)
labels[right] = ["dir"]
bc_val = np.zeros(g.num_faces)
bc_dir = bound_faces[right]
bc_neu = bound_faces[left]
bc_val[bc_dir] = g.face_centers[0, bc_dir]
bc_val[bc_neu] = -g.face_areas[bc_neu] * a_dim
param.set_bc(solver, bc.BoundaryCondition(g, bound_faces, labels))
param.set_bc_val(solver, bc_val)
else:
param.set_bc("flow", bc.BoundaryCondition(g, np.empty(0), np.empty(0)))
d["param"] = param
coupling_conditions = tpfa.TpfaCoupling(solver)
solver_coupler = coupler.Coupler(solver, coupling_conditions)
A, rhs = solver_coupler.matrix_rhs(gb)
p = sps.linalg.spsolve(A, rhs)
p_cond, _, _, _ = condensation.solve_static_condensation(A, rhs, gb, dim=0)
solver_coupler.split(gb, "pressure", p)
solver_coupler.split(gb, "p_cond", p_cond)
tol = 1e-10
self.assertTrue((np.amax(np.absolute(p - p_cond))) < tol)
self.assertTrue(
np.sum(error.error_L2(g, d["pressure"], d["p_cond"]) for g, d in gb) < tol
)
