Seams

A seam is an entity designed to impede the flow of current according to the impedance assigned. The impedance can be specified with resistive, inductive, and capacitive impedance components. The seam is designed to provide an impedance according to the circuit provided below.

Unlike the EMA3D® input file entries for ‘thin gaps’ or ‘inline seams’, the seam entries lie on the normal field where the algorithm is enacted.

There are two seam impedance specification types. These are the ‘absolute’ and the ‘density’ specifications. The ‘absolute’ definition assigns a given impedance to the entire seam, independent of size (i.e. length or area). The ‘density’ specification assigns an impedance/length or an impedance per unit area.

When using the ‘density’ specification the length and area are associated with the meshed In some cases, the meshed length may be longer than the geometric line or the meshed surface of greater area than the geometric surface. This is due to stair stepping nature of the meshed geometric entities.