in this paper, a new algorithm for studying elastic wave propagation in the phononic crystals is presented. at first, the displacement-based forms of elastic wave equations are derived and then the forms are discretized using finite difference method. so the new algorithm is called the displacement-based finite difference time domain (dbfdtd). three numerical examples are computed with this met...

A new discrete Green’s function formulation of the finite difference time domain (DGF-FDTD) method has been developed which expresses the field response as a convolution of the current sources and the impulse response of the FDTD equation system. DGF-FDTD avoids the need for computation of free space nodes and absorbing boundary conditions. The method has been demonstrated by its application to...

Abstract This is a tutorial paper on the basics and applications of finite-difference time-domain (FDTD) method. Two types discretization linear governing equations, scalar-type FDTD method vector-type one, are first discussed. Then basic concept compact explicit-FDTD (CE-FDTD) described. By considering relationship between cutoff frequency computer resources, it shown that interpolated wide ba...

A three-dimensional finite-difference time-domain (FDTD) program has been developed to provide a numerical solution for light scattering by nonspherical dielectric particles. The perfectly matched layer (PML) absorbing boundary condition (ABC) is used to truncate the computational domain. As a result of using the PML ABC, the present FDTD program requires much less computer memory and CPU time ...

In this paper, a new algorithm for twodimensional (2-D) finite-difference time-domain (FDTD) method is presented. By this new method, the maximum time step size can be increased over the Courant-FriedrichLevy (CFL) condition restraint. This new algorithm is adapted from an Alternating-Direction Implicit FDTD (ADI-FDTD) method. However, unlike the ADI-FDTD algorithm, the alternation is performed...

In this letter, a low numerical dispersion error single field (SF) hybrid implicit explicit (HIE) finite-difference time-domain (FDTD) method with artificial anisotropic (AA) parameters, AA-SF-HIE-FDTD for short, is proposed. Based on the formulas of SF-HIE-FDTD and by introducing electric anisotropy updated functions 3-D AA-SF-HIE FDTD can be obtained. The relation Fourier investigated. Compar...

In this paper, the parallel implementation of the Wave-Equation Finite Difference Time Domain (WE-FDTD) method, using the Message Passing Interface (MPI) system, is presented. The WE-FDTD computational domain is divided into subdomains using onedimensional topology. Numerical simulations have been carried out for a line current source radiating in two-dimensional domains of different sizes and ...