Perfectly matched layer-absorbing boundary condition for finite-element time-domain modeling of elastic wave equations

2013 ◽  
Vol 10 (3) ◽  
pp. 323-336 ◽  
Author(s):  
Jian-Guo Zhao ◽  
Rui-Qi Shi
Keyword(s):  
Boundary Condition ◽  
Finite Element ◽  
Elastic Wave ◽  
Time Domain ◽  
Wave Equations ◽  
Absorbing Boundary Condition ◽  
Domain Modeling ◽  
Absorbing Boundary ◽  
Elastic Wave Equations ◽  
Time Domain Modeling

Finite element time domain modeling of controlled-source electromagnetic data with a hybrid boundary condition

2017 ◽  
Vol 145 ◽  
pp. 133-143 ◽  
Author(s):  
Hongzhu Cai ◽  
Xiangyun Hu ◽  
Bin Xiong ◽  
Esben Auken ◽  
Muran Han ◽  
...  
Keyword(s):  
Boundary Condition ◽  
Finite Element ◽  
Time Domain ◽  
Domain Modeling ◽  
Controlled Source ◽  
Electromagnetic Data ◽  
Time Domain Modeling

Instabilities in applying absorbing boundary conditions to high‐order seismic modeling algorithms

Geophysics ◽  
1998 ◽  
Vol 63 (3) ◽  
pp. 1017-1023 ◽  
Author(s):  
Antonio Simone ◽  
Stig Hestholm
Keyword(s):  
Boundary Condition ◽  
Acoustic Wave ◽  
Elastic Wave ◽  
Wave Equations ◽  
Absorbing Boundary Conditions ◽  
Absorbing Boundary Condition ◽  
Seismic Modeling ◽  
Absorbing Boundary ◽  
Numerical Grid ◽  
Numerical Discretization

The problem of artificial reflections from grid boundaries in the numerical discretization of elastic and acoustic wave equations has long plagued geophysicists. Even if modern computers have made it possible to extend the synthetics over more wavelengths (equivalent to larger propagation distances), efficient absorption methods are still needed to minimize interference from unwanted reflections from the numerical grid boundaries. In this study, we examine applicabilities and stabilities of the optimal absorbing boundary condition (OABC) of Peng and Toksöz (1994, 1995) for 2-D and 3-D acoustic and elastic wave modeling. As a basis for comparison, we use exponential damping (ED) (Cerjan et. al., 1985), in which velocities and stresses are multiplied by progressively decreasing terms when approaching the boundaries of the numerical grid.

Sign in / Sign up

Export Citation Format

Share Document