Qs. Chen et al., ASYMPTOTIC BOUNDARY-CONDITIONS FOR AXISYMMETRICAL FINITE-ELEMENT ELECTROSTATIC ANALYSIS, IEEE transactions on magnetics, 30(6), 1994, pp. 4335-4337
Asymptotic boundary conditions (ABC) for rectangular outer boundaries
are formulated and used for the finite element computation of axisymme
tric electrostatic fields. ABC-s for rectangular boundaries are more e
fficient than ABC-s with circular boundaries for problems with large a
spect ratios. To illustrate this formulation, three axisymmetric elect
rostatic problems are solved. Potential distributions and electric fie
ld strengths are obtained. The results using ABC-s are compared with a
nalytic solutions or solutions obtained by boundary truncation techniq
ues.