Numerical experiment of a human head slice is conducted and the results show the accuracy and efficiency of the two-level hierarchical method. FDM can give the anisotropic properties of the material, while Bruggeman formula can only yield isotropic ones. Finite-difference method (FDM) and Bruggeman formula are utilized to calculate the effective property in each big grid. These big grids are then applied in FDTD method to calculate the scattering of the target. The electrical property in each big grid is treated as homogeneous and the electrical value is obtained with the values of the small grids within it. We explain how the fast FDTD simulation of large-scale metamaterials can be achieved through communication optimization in a heterogeneous CPU/GPU-based computer cluster. In level two, the model is then partitioned to big grids, each of which covers several small grids. FDTD (Finite-Difference Time-Domain) is a powerful and popular simulation method for photonics, and it will allow you to obtain initial results quickly for a. The FDTD computation can be significantly accelerated when GPUs are used instead of only central processing units (CPUs). computational resources are being developed and improved really extremely fast. Each grid is assigned a value of electrical property at that position. Finite Difference in Time Domain method (FDTD) is a well known numerical. In level one, the model is partitioned to many small grids to fit the target's heterogeneous characteristics. To overcome this issue, we propose a two-level hierarchical approach to reduce the grid number of the model in scattering calculation. For complex target, the grid must be very small to fit the detail of the material's distribution. It does not make any approximations or assumptions about the. derivatives are handled with finite differences. The equations are solved numerically on a discrete grid in both space and time, and.
The heterogeneous target sometimes can be a really large model, which may be time-consuming and requires significant computer resources to finish the scattering computation using FDTD method. The finite-difference time-domain (FDTD) method is used to solve Maxwell's equations in the. This paper presents a fast finite-difference time-domain (FDTD) method to calculate the scattering of heterogeneous target by utilizing effective electrical properties of the material in local areas.