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Wyniki wyszukiwania dla: discrete green's function (dgf)

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Wyniki wyszukiwania dla: discrete green's function (dgf)

  • Accuracy of the discrete Green's function computations

    Publikacja

    - Rok 2012

    This paper discusses the accuracy of the discrete Green's function (DGF) computations. Recently closed-form expression of the DGF and its efficient numerical implementation were presented which facilitate the DGF applications in FDTD simulations of radiation and scattering problems. By carefully comparing the DGF results to those of the FDTD simulation, one can make conclusions about the range of the applicability of the DGF for...

  • Acceleration of the discrete Green's function computations

    Publikacja

    - Rok 2012

    Results of the acceleration of the 3-D discrete Green's function (DGF) computations on the multicore processor are presented. The code was developed in the multiple precision arithmetic with use of the OpenMP parallel programming interface. As a result, the speedup factor of three orders of magnitude compared to the previous implementation was obtained thus applicability of the DGF in FDTD simulations was significantly improved.

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  • FDTD-Compatible Green's function based on scalar discrete Green's function and multidimensional Z-transform

    Publikacja

    - Rok 2015

    In this contribution, a new formulation of the discrete Green's function (DGF) is presented for the finitedifference time-domain (FDTD) grid. Recently, dyadic DGF has been derived from the impulse response of the discretized scalar wave equation (i.e., scalar DGF) with the use of the multidimensional Z-transform. Its software implementation is straightforward because only elementary functions are involved and a single function...

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  • Windowing of the Discrete Green's Function for Accurate FDTD Computations

    Publikacja

    - Rok 2013

    The paper presents systematic evaluation of the applicability of parametric and nonparametric window functions for truncation of the discrete Green's function (DGF). This function is directly derived from the FDTD update equations, thus the FDTD method and its integral discrete formulation can be perfectly coupled using DGF. Unfortunately, the DGF computations require processor time, hence DGF has to be truncated with appropriate...

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  • Hybridization of the FDTD method with use of the discrete Green's function

    Publikacja

    - Rok 2014

    In this contribution, a hybrid technique is presented which combines the finite-difference time-domain (FDTD) method and the discrete Green's function (DGF) formulation of this method. FDTD is a powerful technique for the analysis of complex penetrable objects but its application is not efficient when the computational domain includes many free-space cells. Therefore, the hybrid method was developed which is applicable to complex...