A Modified Liao's Absorbing Boundary Condition for FDTD Simulations in 2-D Cylindrical Coordinates with Rotational Symmetry

A modified Liao's absorbing boundary condition (ABC) for finite-difference time-domain (FDTD) simulations in 2-D cylindrical coordinates with rotational A modified Liao's absorbing boundary condition (ABC) for finite-difference time-domain (FDTD) simulations in 2-D cylindrical coordinates with rotational symmetry is presented in this paper. Like the ordinary Liao's ABC that was used in Cartesian coordinates, the modified Liao's ABC is easy to implement even near the corners of a computation grid. Further more, the presented Liao's ABC does not encounter stable problem. A numerical example is given to validate the introduced ABC.symmetry is presented in this paper. Like the ordinary Liao's ABC that was used in Cartesian coordinates, the modified Liao's ABC is easy to implement even near the corners of a computation grid. Further more, the presented Liao's ABC does not encounter stable problem. A numerical example is given to validate the introduced ABC.