PE approximations for scattering from a rough surface / D.J. Thomson, G.H. Brooke & E.S. Holmes.: DR52-11/27-1995E-PDF
"Two methods are presented for incorporating the effects of rough boundaries into propagation models based on the parabolic equation (PE) approximation. In particular, the acoustic scattering by a deterministically-rough, pressure-release surface is considered. In the first method, the vertical extent of the computational cell adjacent to the rough boundary is allowed to vary with range. This non-standard grid approach can readily be incorporated into existing finite-difference PE codes. In the second method, a low-impedance air-layer backing is appended to the rough surface and the original rough-surface scattering problem is replaced by one involving scattering from an internal, water/air interface. In this case, both finite-difference and split-step marching algorithms can be accommodated. Numerical results for the forward-scattered component of the field are provided for two benchmark problems"--Abstract (page 1).
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.953879&sl=0
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| Title | PE approximations for scattering from a rough surface / D.J. Thomson, G.H. Brooke & E.S. Holmes. |
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| Publication type | Monograph - View Master Record |
| Language | [English] |
| Format | Digital text |
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| Description | 1 online resource (19 pages, 3 unnumbered pages) : illustrations, charts. |
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