Пример #1
0
class test_fillament_current_source(unittest.TestCase):
    test_data_file = 'fillament_source_test_data.pickle'
    rtol=1e-10
    atol=1e-12
    
    def setUp(self):
        desired_file = Paths.get_module_path_file(self.test_data_file, __file__)
        env = self.environment = FillamentEnvironment(desired_file)
        self.DUT = FillamentCurrentSource()
        self.DUT.set_function_space(env.discretisation_space)
        self.DUT.set_no_integration_points(env.no_integration_points)
        self.DUT.set_source_endpoints(env.source_endpoints)
        self.DUT.set_value(env.I)

    def test_source(self):
        actual_dofnos, actual_rhs = self.DUT.get_contribution()
        sortind = np.argsort(actual_dofnos)
        actual_dofnos = actual_dofnos[sortind].copy()
        actual_rhs = actual_rhs[sortind].copy()
        self.assertTrue(np.all(actual_dofnos == self.environment.desired_dofnos))
        self.assertTrue(np.allclose(actual_rhs, self.environment.desired_rhs_contribs,
                                    rtol=self.rtol, atol=self.atol))

    def test_negative_direction(self):
        dofnos, rhs = self.DUT.get_contribution()
        sortind = np.argsort(dofnos)
        dofnos = dofnos[sortind]
        rhs = rhs[sortind]
        self.DUT.set_source_endpoints(-self.DUT.source_endpoints)
        dofnos_neg, rhs_neg = self.DUT.get_contribution()
        sortind = np.argsort(dofnos_neg)
        dofnos_neg = dofnos_neg[sortind]
        rhs_neg = rhs_neg[sortind]
        self.assertTrue(np.all(dofnos == dofnos_neg))
        self.assertTrue(np.allclose(rhs, -rhs_neg))
Пример #2
0
    def get_current_source(self):
        """get FillamentCurrentSource instance

        Each call results in a new instance being instantiated.
        """
        cs = FillamentCurrentSource()
        cs.set_function_space(self.function_space)
        cs.set_source_endpoints(self.source_parameters['endpoints'])
        cs.set_value(self.source_parameters['I'])
        return cs
Пример #3
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    def test_ff_error(self):
        sucemfem.Utilities.Optimization.set_dolfin_optimisation(True)
        ### Postprocessing requests
        theta_deg = N.linspace(10, 170, 161)
        no_ff_pts = len(theta_deg)
        phi_deg = N.zeros(no_ff_pts)
        ### Problem parameters
        freq =  1.0e+9                          # Frequency
        lam = c0/freq
        l = lam/4                               # Dipole length
        I = 1.0                                 # Dipole current
        source_direction_z = N.array([0,0,1.])    # Source orientation
        source_direction_x = N.array([1.,0,0])    # Source orientation
        source_direction_y = N.array([0,1,0.])    # Source orientation
        source_centre = N.array([0,0,0.])        # Position of the source
        source_endpoints_z =  N.array(
            [-source_direction_z*l/2, source_direction_z*l/2]) + source_centre
        source_endpoints_x =  N.array(
            [-source_direction_x*l/2, source_direction_x*l/2]) + source_centre
        source_endpoints_y =  N.array(
            [-source_direction_y*l/2, source_direction_y*l/2]) + source_centre

        ### Discretisation settings
        order = 2
        domain_size = N.array([lam]*3)*1
        max_edge_len = lam/6
        mesh = get_centred_cube(domain_size, max_edge_len)

        ### Implementation
        #
        ## Set up materials function with all free-space
        material_mesh_func = dolfin.MeshFunction('uint', mesh, 3)
        material_mesh_func.set_all(0)
        materials = {0:dict(eps_r=1, mu_r=1),}
        ## Set up 1st-order analytical ABC
        abc = ABCBoundaryCondition()
        abc.set_region_number(1)
        bcs = BoundaryConditions()
        bcs.add_boundary_condition(abc)
        ## Set up high level problem class
        dp = DrivenProblemABC()
        dp.set_mesh(mesh)
        dp.set_basis_order(order)
        dp.set_material_regions(materials)
        dp.set_region_meshfunction(material_mesh_func)
        dp.set_boundary_conditions(bcs)
        ## Set up current fillament source
        current_sources = sucemfem.Sources.current_source.CurrentSources()
        fillament_source = FillamentCurrentSource()
        fillament_source.no_integration_points = 1000
        fillament_source.set_source_endpoints(source_endpoints_z)
        fillament_source.set_value(I)
        current_sources.add_source(fillament_source)
        ## Set source in problem container
        dp.set_sources(current_sources)
        dp.init_problem()
        dp.set_frequency(freq)

        ## Get sytem LHS matrix and RHS Vector
        A = dp.get_LHS_matrix()
        b_z = dp.get_RHS()
        fillament_source.set_source_endpoints(source_endpoints_x)
        b_x = dp.get_RHS()
        fillament_source.set_source_endpoints(source_endpoints_y)
        b_y = dp.get_RHS()

        #import pdb ; pdb.set_trace()
        A
        print 'solve using UMFPack'
        umf_solver = sucemfem.Utilities.LinalgSolvers.UMFPACKSolver(A)
        x_z = umf_solver.solve(b_z)
        x_x = umf_solver.solve(b_x)
        x_y = umf_solver.solve(b_y)

        ## Post-process solution to obtain far-field
        print 'calculating far field'
        surf_ntff = surface_ntff.NTFF(dp.function_space)
        surf_ntff.set_dofs(x_z)
        surf_ntff.set_frequency(freq)
        surf_E_ff_z = N.array([surf_ntff.calc_pt(th_deg, ph_deg)
                        for th_deg, ph_deg in zip(theta_deg, phi_deg)])
        surf_E_theta_z = surf_E_ff_z[:,0]
        surf_E_phi_z = surf_E_ff_z[:,1]
        surf_ntff.set_dofs(x_x)
        surf_E_ff_x = N.array([surf_ntff.calc_pt(th_deg+90, ph_deg)
                        for th_deg, ph_deg in zip(theta_deg, phi_deg)])
        surf_E_theta_x = surf_E_ff_x[:,0]
        surf_E_phi_x = surf_E_ff_x[:,1]
        surf_ntff.set_dofs(x_y)
        surf_E_ff_y = N.array([surf_ntff.calc_pt(th_deg+90, ph_deg)
                        for th_deg, ph_deg in zip(theta_deg, phi_deg)])
        surf_E_theta_y = surf_E_ff_y[:,0]
        surf_E_phi_y = surf_E_ff_y[:,1]

        ## Calculate some errors relative to the analytical solution
        an_E_theta = [current_fillament_farfield.eval_E_theta(freq, l, I, th)
                      for th in N.deg2rad(theta_deg)]
        err_z = normalised_RMS(
            surf_E_theta_z, an_E_theta, surf_E_phi_z)
        err_theta_z = normalised_RMS(surf_E_theta_z, an_E_theta)
        err_abs_theta_z = normalised_RMS(N.abs(surf_E_theta_z),
                                       N.abs(an_E_theta))
        err_x = normalised_RMS(
            surf_E_theta_x, an_E_theta, surf_E_phi_x)
        err_theta_x = normalised_RMS(surf_E_theta_x, an_E_theta)
        err_abs_theta_x = normalised_RMS(N.abs(surf_E_theta_x),
                                       N.abs(an_E_theta))
        err_y = normalised_RMS(
            surf_E_theta_y, an_E_theta, surf_E_phi_y)
        err_theta_y = normalised_RMS(surf_E_theta_y, an_E_theta)
        err_abs_theta_y = normalised_RMS(N.abs(surf_E_theta_y),
                                       N.abs(an_E_theta))
        print 'Far-field RMS error: ', err_z, err_x, err_y
        # Expected error for lam/6 mesh, 2nd order discretisation,
        # lam/4 current fillament source is ~4.685%
        self.assertTrue(err_z < 4.7)      
        self.assertTrue(err_x < 4.7)      
        self.assertTrue(err_z < 4.7)      
Пример #4
0
## Set up 1st-order analytical ABC
abc = ABCBoundaryCondition()
abc.set_region_number(1)
bcs = BoundaryConditions()
bcs.add_boundary_condition(abc)
## Set up high level problem class
dp = DrivenProblemABC()
dp.set_mesh(mesh)
dp.set_basis_order(order)
dp.set_material_regions(materials)
dp.set_region_meshfunction(material_mesh_func)
dp.set_boundary_conditions(bcs)
## Set up current fillament source
current_sources = sucemfem.Sources.current_source.CurrentSources()
fillament_source = FillamentCurrentSource()
fillament_source.set_source_endpoints(source_endpoints)
fillament_source.set_value(I)
current_sources.add_source(fillament_source)
## Set source in problem container
dp.set_sources(current_sources)
dp.init_problem()
dp.set_frequency(freq)

## Get sytem LHS matrix and RHS Vector
A = dp.get_LHS_matrix()
b = dp.get_RHS()
## Solve. Choose spare solver if UMFPack runsout of memory
# print 'solve using scipy bicgstab'
# x = solve_sparse_system ( A, b, preconditioner_type='diagonal')
print 'solve using UMFPack'
umf_solver = sucemfem.Utilities.LinalgSolvers.UMFPACKSolver(A)
Пример #5
0
abc = ABCBoundaryCondition()
abc.set_region_number(1)
bcs = BoundaryConditions()
bcs.add_boundary_condition(abc)
## Set up high level problem class
dp = DrivenProblemABC()
dp.set_mesh(mesh)
dp.set_basis_order(order)
dp.set_material_regions(materials)
dp.set_region_meshfunction(material_mesh_func)
dp.set_boundary_conditions(bcs)
## Set up current fillament source
current_sources = sucemfem.Sources.current_source.CurrentSources()
fillament_source = FillamentCurrentSource()
fillament_source.no_integration_points = 1000
fillament_source.set_source_endpoints(source_endpoints_z)
fillament_source.set_value(I)
current_sources.add_source(fillament_source)
## Set source in problem container
dp.set_sources(current_sources)
dp.init_problem()
dp.set_frequency(freq)

## Get sytem LHS matrix and RHS Vector
A = dp.get_LHS_matrix()
b_z = dp.get_RHS()

#import pdb ; pdb.set_trace()
A
print 'solve using UMFPack'
umf_solver = sucemfem.Utilities.LinalgSolvers.UMFPACKSolver(A)
l = lam/4                               # Dipole length
# l = 2.3*lam                               # Dipole length
I = 1.0                                 # Dipole current
source_direction = np.array([0,0,1.])    # Source orientation
source_centre = np.array([0,0,0.])        # Position of the source
source_endpoints =  np.array(
    [-source_direction*l/2, source_direction*l/2]) + source_centre

## Discretisation settings
order = 2
domain_size = np.array([lam]*3)/2
max_edge_len = lam/3
mesh = get_centred_cube(domain_size, max_edge_len)
## Implementation
V = dolfin.FunctionSpace(mesh, "Nedelec 1st kind H(curl)", order)
dipole_source = FillamentCurrentSource()
dipole_source.no_integration_points = 20
dipole_source.set_function_space(V)
dipole_source.set_source_endpoints(source_endpoints)
dipole_source.set_value(I)
dofnos, rhs_contribs = dipole_source.get_contribution()
sortind = np.argsort(dofnos)
dofnos = dofnos[sortind].copy()
rhs_contribs = rhs_contribs[sortind].copy()

pickle.dump(dict(order=order,I=I, source_endpoints=source_endpoints,
                 domain_size=domain_size, max_edge_len=max_edge_len,
                 no_integration_points=dipole_source.no_integration_points,
                 dofnos=dofnos, rhs_contribs=rhs_contribs),
            open('fillament_source_test_data.pickle', 'w'))
Пример #7
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bcs.add_boundary_condition(abc)
pec_walls = PECWallsBoundaryCondition()
pec_walls.init_with_meshfunction (pec_mesh_function, PEC_label)
bcs.add_boundary_condition(pec_walls)

## Set up high level problem class
dp = DrivenProblemABC()
dp.set_mesh(mesh)
dp.set_basis_order(order)
dp.set_material_regions(materials)
dp.set_region_meshfunction(materials_mesh_function)
dp.set_boundary_conditions(bcs)
## Set up current fillament source
current_sources = sucemfem.Sources.current_source.CurrentSources()
fillament_source = FillamentCurrentSource()
fillament_source.set_source_endpoints(feed_pts)
fillament_source.set_value(I)
current_sources.add_source(fillament_source)
## Set source in problem container
dp.set_sources(current_sources)
print 'init problem'
dp.init_problem()
Zs = []

def get_solver(type, A):
    ## Solve. Choose sparse solver if UMFPack runsout of memory
    if type == 'umfpack':
        print 'solve using UMFPack'
        solver = sucemfem.Utilities.LinalgSolvers.UMFPACKSolver(A)
    elif type == 'bicgstab':
        print 'solve using scipy bicgstab'
Пример #8
0
source_direction = np.array([0, 0, 1.])  # Source orientation
source_centre = np.array([0, 0, 0.])  # Position of the source
source_endpoints = np.array(
    [-source_direction * l / 2, source_direction * l / 2]) + source_centre

## Discretisation settings
order = 2
domain_size = np.array([lam] * 3) / 2
max_edge_len = lam / 3
mesh = get_centred_cube(domain_size, max_edge_len)
## Implementation
V = dolfin.FunctionSpace(mesh, "Nedelec 1st kind H(curl)", order)
dipole_source = FillamentCurrentSource()
dipole_source.no_integration_points = 20
dipole_source.set_function_space(V)
dipole_source.set_source_endpoints(source_endpoints)
dipole_source.set_value(I)
dofnos, rhs_contribs = dipole_source.get_contribution()
sortind = np.argsort(dofnos)
dofnos = dofnos[sortind].copy()
rhs_contribs = rhs_contribs[sortind].copy()

pickle.dump(
    dict(order=order,
         I=I,
         source_endpoints=source_endpoints,
         domain_size=domain_size,
         max_edge_len=max_edge_len,
         no_integration_points=dipole_source.no_integration_points,
         dofnos=dofnos,
         rhs_contribs=rhs_contribs),