discretize.CylindricalMesh.project_face_to_boundary_face#

property CylindricalMesh.project_face_to_boundary_face#

Projection matrix from all faces to boundary faces.

Constructs and returns a matrix $\mathbf{P}$ that projects from all mesh faces to boundary faces. That is, for a discrete vector $\mathbf{u}$ that lives on the faces, the values on the boundary faces ${\mathbf{u}}_{\mathbf{b}}$ can be extracted via the following matrix-vector product:

ub = P @ u

Returns:

scipy.sparse.csr_matrix

(n_boundary_faces, n_faces) Projection matrix with shape