bfieldtools.mesh_magnetics.scalar_potential_coupling

bfieldtools.mesh_magnetics.scalar_potential_coupling(mesh, r, Nchunks=None, multiply_coeff=False, approx_far=False, margin=3)

Coupling matrix from a stream function on a mesh to scalar potential using analytic integrals.

Parameters

mesh: Trimesh mesh object

mesh describing the geometry of the field source

r: ndarray (Np, 3)

evaluation points

Nchunks: int

number of chunks used in the calculation for saving memory

multiply_coeff: boolean

If True, multiply result by mu_0/(4*pi)

approx_far: boolean,

approximate the potential using simple quadrature (see integrals.potential_dipoles) for points far from the source triangles

margin: float

cut-off distance for “far” points measured in mean triangle side length.

Returns

U: ndarray (Np, Nvertices)

Coupling matrix corresponding to a mapping from a stream function on the mesh to scalar potential at the evaluation points