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 )