SCATTERING NEAR A PLANE INTERFACE USING A GENERALIZED METHOD OF IMAGES APPROACH

2004 ◽  
Vol 12 (02) ◽  
pp. 233-256 ◽  
Author(s):  
ARNAUD COATANHAY ◽  
JEAN-MARC CONOIR
Keyword(s):  
Plane Wave ◽  
Acoustic Field ◽  
High Frequency ◽  
Plane Interface ◽  
Geometrical Theory ◽  
Method Of Images ◽  
Asymptotic Results ◽  
Plane Wave Incident ◽  
Geometrical Theory Of Diffraction ◽  
Long Cylinder

A new method for predicting the scattered acoustic field due to a plane wave incident upon an infinitely long cylinder lying near an penetrable plane interface is presented. The method generalizes the method of images which is restricted to rigid and soft plane interfaces. Validity domains, physical interpretations, simulations and numerical results are described for sedimentary medium-fluid plane interfaces. And, they are well compared with high frequency asymptotic results based on the Geometrical Theory of Diffraction(G.T.D.).

scholarly journals Useful Solutions for Plane Wave Diffraction by Dielectric Slabs and Wedges

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Gianluca Gennarelli ◽  
Giovanni Riccio
Keyword(s):  
Plane Wave ◽  
Wave Diffraction ◽  
Transition Function ◽  
Physical Optics ◽  
Surface Currents ◽  
Geometrical Theory ◽  
Numerical Tests ◽  
Physical Optics Approximation ◽  
Geometrical Theory Of Diffraction ◽  
Plane Wave Diffraction

This work presents an overview of available uniform asymptotic physical optics solutions for evaluating the plane wave diffraction by some canonical geometries of large interest: dielectric slabs and wedges. Such solutions are based on a physical optics approximation of the electric and magnetic equivalent surface currents in the involved scattering integrals. The resulting diffraction coefficients are expressed in terms of the geometrical optics response of the considered structure and the standard transition function of the Uniform Geometrical Theory of Diffraction. Numerical tests and comparisons make evident the effectiveness and reliability of the presented solutions.

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