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Multisector Parabolic Equation Method for Scattering From Impenetrable Objects in Fluid Waveguides
- Source :
- IEEE Access, Vol 9, Pp 45068-45077 (2021)
- Publication Year :
- 2021
- Publisher :
- IEEE, 2021.
-
Abstract
- Parabolic equation methods are a robust and efficient tool for modeling long-range acoustic propagation in range-dependent waveguides. A lesser known, but equally effective, application of parabolic equations is to the scattering problem. In this paper, we study the applicability and accuracy of the multisector parabolic equation approach to scattering from impenetrable objects – first developed approximately two decades ago for convex objects and recently extended to more complex scatterers – in waveguides in two and three dimensions. We benchmark the method in two dimensions in a range-dependent waveguide consisting of two different fluid media and find very good agreement with finite element methods for both forward scattering and backscattering, including the case where the scatterer is located at the interface between the media. Finally, we provide an example of scattering in a large three-dimensional waveguide, which would be extremely computationally intensive using alternate approaches, but is practical using the parabolic equation method.
- Subjects :
- Acoustic parabolic equation
General Computer Science
Forward scatter
acoustic propagation
fluid waveguide
01 natural sciences
010305 fluids & plasmas
law.invention
law
0103 physical sciences
General Materials Science
010306 general physics
Physics
Scattering
Mathematical analysis
General Engineering
Regular polygon
acoustic scattering
Parabolic partial differential equation
Finite element method
numerical simulation
Acoustic propagation
Benchmark (computing)
lcsh:Electrical engineering. Electronics. Nuclear engineering
Waveguide
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 21693536
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....d021c0274491575f734c6e90ef6287d7