Corner 2D Capacitance

The 2D geometric corner permeance (capacitance or conductance) was introduced for easier accurate calculation of magnetic and electric circuits containing regions with strong non uniform field. For infinitely long both arms of the corner and for infinitely long one arm and zero length of the other one, exact formulas for geometric corner permeance were derived and for short one arm and the length of the other one equal to zero or infinite good approximate formulas were proposed. In this paper the case of both short arms is studied by finite element method and a new approximate formula is proposed. Thus the problem of rectangular corner parameters is completely solved.