| Abstract: | In this paper, a set of unified finite difference time domain (FDTD) formulae are presented. These formulae are applicable to underwater sound scattering from various objects with a finite acoustic impedance, either with or without shear strains. A major improvement has been made to the FDTD algorithm to remove most of the loop operations. This makes the finite difference field computation very efficient and, more importantly, suitable for the implementation of distributed parallel computing. Other advantages of the new algorithm include the ease in modeling objects having complicated shapes. Numerical experiment results are presented to show the effectiveness of the proposed method. |
