Performances of absorbing boundary conditions on 2-D leapfrog alternating direction implicit FDTD

Wang Wenbing; Zhou Hui; Liu Yifei; Ma Liang; Cheng Yinhui

doi:10.11884/HPLPB201830.180052

Volume 30 Issue 10

Oct. 2018

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Wang Wenbing, Zhou Hui, Liu Yifei, et al. Performances of absorbing boundary conditions on 2-D leapfrog alternating direction implicit FDTD[J]. High Power Laser and Particle Beams, 2018, 30: 103204. doi: 10.11884/HPLPB201830.180052

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Wang Wenbing, Zhou Hui, Liu Yifei, et al. Performances of absorbing boundary conditions on 2-D leapfrog alternating direction implicit FDTD[J]. High Power Laser and Particle Beams, 2018, 30: 103204. doi: 10.11884/HPLPB201830.180052

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Performances of absorbing boundary conditions on 2-D leapfrog alternating direction implicit FDTD

doi: 10.11884/HPLPB201830.180052

National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China

Received Date: 2018-02-07
Rev Recd Date: 2018-06-28
Publish Date: 2018-10-15

Abstract

Abstract

This paper presents two kinds of absorbing boundaries for the two-dimensional (2-D) Leapfrog Alternating Direction Implicit Finite-Difference Time-Domain (Leapfrog ADI-FDTD) method—Mur boundary and CPML absorbing boundary condition. Leapfrog ADI-FDTD had unconditional stability and all the iterative equations were implicit. However, the electric and magnetic field components for the 2-D leapfrog ADI-FDTD method were updated implicitly as well as explicitly, absorbing boundary condition for difference components might keep diversity. Updating equations of CPML are presented in the paper according to its derived theory and compared with first-order Mur absorbing boundary condition. What's more, the reflection error of free space was used to represent absorbing ability of absorbing boundary condition.
- leapfrog ADI-FDTD,
- unconditional stability,
- Mur absorbing boundary condition,
- CPML absorbing boundary condition,
- absorbing ability

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References(9)

References

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