Implementation of total-field/scattered-field technique in the 2-D LOD-FDTD method

2009 ◽  
Author(s):  
Gurpreet Singh ◽  
Eng Leong Tan ◽  
Zhi Ning Chen
Keyword(s):  
Scattered Field ◽  
Fdtd Method ◽  
Total Field ◽  
Field Technique

Memory-Efficient 3-D LWD Solver With the Flipped Total Field/Scattered Field-Based DGFD Method

2020 ◽  
Vol 17 (9) ◽  
pp. 1498-1502 ◽  
Author(s):  
Runren Zhang ◽  
Zhenguan Wu ◽  
Qingtao Sun ◽  
Mingwei Zhuang ◽  
Qiang-Ming Cai ◽  
...  
Keyword(s):  
Scattered Field ◽  
Total Field ◽  
Memory Efficient

Application of Symplectic Partitioned Runge-Kutta Method and Total-Field Scattered-Field Formulation to Simulation of GPR Data

2014 ◽  
Vol 926-930 ◽  
pp. 2777-2780
Author(s):  
Hong Yuan Fang ◽  
Jian Li ◽  
Jia Li
Keyword(s):  
Scattered Field ◽  
Measured Signal ◽  
Total Field ◽  
Time Step ◽  
Absorbing Boundary ◽  
Runge Kutta Method ◽  
Actual Field ◽  
Ground Penetrating ◽  
Radar Wave ◽  
Difference Time

The second-order Lobatto IIIA-IIIB symplectic partitioned RungeKutta (SPRK) method, combining with the first-order Mur absorbing boundary condition, is developed for the simulation of ground penetrating radar wave propagation in layered pavement structure. For 2-dimetional case, a significant advantage of this method is that only two functions need to be calculated at each time step. The total-field/scattered-field technique is used for plane wave excitation. Numerical examples are presented to verify the accuracy and efficiency of the proposed algorithm. The results illustrate that the reflected signal calculated by the SPRK method is in good agreement with that obtained using the finite difference time domain (FDTD) scheme, but the CPU time consumed by proposed algorithm is reduce about 20% of the FDTD scheme. In addition, an actual field test is conducted to evaluate the further performance of the SPRK method. It is found that the simulated waveform fits well with the measured signal in many aspects, especially in the peak amplitude and time delay.

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