HAL (France)
open access
Diffraction of waves by finite thin coatings : asymptotic expansion and effective models
We consider the Helmholtz equation in a Dirichlet angular sector (which may be locally perturbed) covered on one side by a thin homogeneous layer. First, we propose an asymptotic expansion of the solution at any order and for any angle when the thickness of the layer tends to 0, using a matched asym
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