scholarly journals Wave field splitting, invariant imbedding, and phase space analysis applied to ocean acoustic wave propagation modeling.

1992 ◽  
Vol 91 (4) ◽  
pp. 2390-2390
Author(s):  
Louis Fishman
Keyword(s):  
Wave Propagation ◽  
Phase Space ◽  
Acoustic Wave ◽  
Wave Field ◽  
Invariant Imbedding ◽  
Acoustic Wave Propagation ◽  
Space Analysis ◽  
Propagation Modeling ◽  
Ocean Acoustic Wave ◽  
Wave Propagation Modeling

Application of the nearly perfectly matched layer in acoustic wave modeling

Geophysics ◽  
2007 ◽  
Vol 72 (5) ◽  
pp. SM169-SM175 ◽  
Author(s):  
Wenyi Hu ◽  
Aria Abubakar ◽  
Tarek M. Habashy
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Computation Time ◽  
Velocity Model ◽  
Perfectly Matched Layer ◽  
Alternative Formulation ◽  
Acoustic Wave Propagation ◽  
Time Saving ◽  
Propagation Modeling ◽  
Wave Propagation Modeling

In this work, we successfully applied an alternative formulation of the perfectly matched layer (PML), the so-called nearly PML (NPML), to acoustic wave propagation modeling. The NPML formulation shows great advantages over the standard complex stretched coordinate PML. The NPML formulation deviates from the standard PML through an inexact variable change, but this fact only affects the wave behavior in the NPML layer, which is outside the region of interest. The equivalence of the wave-absorbing performance between these two PML formulations (the standard complex stretched coordinate PML formulation and the NPML formulation) in 3D Cartesian coordinates for acoustic wave propagation modeling is proved mathematically in this work. In time-domain methods, the advantages of the NPML over the standard PML were explained by both the analytical analysis and the numerical simulations in terms of implementation simplicity and computational efficiency. The computation time saving is up to 17% for the 2D example used in this work. For 3D problems, this computational saving is more significant. After theoretically analyzing the numerical reflections from the NPML and the standard PML, we concluded that these two PML formulations have exactly the same performance, even after spatial discretization. This conclusion is validated by numerical experiment. Finally, we tested the NPML in the Marmousi velocity model and found its wave-absorbing rate is high enough, even for this realistic structure.

Ocean acoustic wave propagation and ray method correspondence: Internal wave fine structure

2005 ◽  
Vol 117 (3) ◽  
pp. 1582-1594 ◽  
Author(s):  
Katherine C. Hegewisch ◽  
Nicholas R. Cerruti ◽  
Steven Tomsovic
Keyword(s):  
Wave Propagation ◽  
Fine Structure ◽  
Acoustic Wave ◽  
Internal Wave ◽  
Acoustic Wave Propagation ◽  
Ray Method ◽  
Ocean Acoustic Wave

Acoustic Wave Propagation in the Sun: Implications for Wave Field and Time-Distance Helioseismology

2003 ◽  
Vol 582 (2) ◽  
pp. L121-L124 ◽  
Author(s):  
C. H. Tong ◽  
M. J. Thompson ◽  
M. R. Warner ◽  
S. P. Rajaguru ◽  
C. C. Pain
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Wave Field ◽  
The Sun ◽  
Acoustic Wave Propagation ◽  
Time Distance
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