sfepy.discrete.fem.geometry_element module

GeometryElement describes the geometric entities of a finite element mesh.

Notes

• geometry_data: surface facets are assumed to be of the same kind for each geometry element - wedges or pyramides are not supported.

• the orientation is a tuple: (root1, vertices of direction vectors, swap from, swap to, root2, …)

class sfepy.discrete.fem.geometry_element.GeometryElement(name)

The geometric entities of a finite element mesh.

create_surface_facet()

Create a GeometryElement instance corresponding to this instance surface facet.

get_conn_permutations()

Get all possible connectivity permutations corresponding to different spatial orientations of the geometry element.

get_edges_per_face()

Return the indices into self.edges per face.

get_grid(n_nod)

Get a grid of n_nod interpolation points, including the geometry element vertices. The number of points must correspond to a valid number of FE nodes for each geometry.

get_interpolation_name()

Get the name of corresponding linear interpolant.

get_surface_entities()

Return self.vertices in 1D, self.edges in 2D and self.faces in 3D.

sfepy.discrete.fem.geometry_element.create_geometry_elements(names=None)

Utility function to create GeometryElement instances.

Parameters:

namesstr, optional

The names of the entity, one of the keys in geometry_data dictionary. If None, all keys of geometry_data are used.

Returns:

gelsdict

The dictionary of geometry elements with names as keys.

sfepy.discrete.fem.geometry_element.setup_orientation(vecs_tuple)