Perfectly matched layer and piecewise-linear recursive convolution for the FDTD solution of the 3D dispersive half-space problem
Perfectly matched layer and piecewise-linear recursive convolution for the FDTD solution of the 3D dispersive half-space problem
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DOI：
10.1109/20.717638
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发表时间：
1998-12
影响因子：
2.1
通讯作者：
F. Teixeira;W. Chew;M. Oristaglio;T. Wang
中科院分区：
文献类型：
--
作者：
F. Teixeira;W. Chew;M. Oristaglio;T. Wang
描述了色散、非均匀半空间问题的三维时域有限差分模拟。该公式使用的完美匹配层（PML）吸收边界条件（ABC）扩展到色散介质。分散的特点是由两个物种德拜模型的参数取自不同含水量的土壤的实验数据。电场的时间步进方案使用分段线性递归卷积（PLRC）方法。对于均匀半空间问题，模拟结果进行了比较，从数值积分的Sommerdom型积分的结果。为了说明其应用，非均匀半空间模拟包括来自真实土壤中埋置物体的探地雷达模拟响应的结果。
A 3D finite-difference time-domain simulation of a dispersive, inhomogeneous half-space problem is described. The formulation uses the perfectly matched layer (PML) absorbing boundary condition (ABC) extended to dispersive media. The dispersion is characterized by a two-species Debye model with parameters taken from reported experimental data of soils with different moisture contents. The time-stepping scheme for the electric field uses the piecewise-linear recursive convolution (PLRC) method. For homogeneous half-space problems, the simulation results are compared against results from numerical integration of Sommerfeld-type integrals. To illustrate its applications, the inhomogeneous half-space simulations include results from the ground penetrating radar simulated response of buried objects in realistic soils.