Short- and long-range penetration of fields and potentials through meshes, grids or gauzes

When a conducting partially-transparent mesh is used to separate two regions of different electrostatic field strength there are short-range changes to the field and potential distributions in the vicinity of the mesh and also long-range changes far from the mesh. The forms and magnitudes of these changes are investigated computationally for meshes that consist of parallel or crossed round wires or crossed flat strips.