Abstract
In this work, a simple and robust nu- merical method to calculate the scattered acous- tic fields from fluid bodies of arbitrary shape sub- jected to a plane wave incidence is presented. Three formulations are investigated in this work viz. thesinglelayer formulation(SLF), thedouble layer formulation (DLF), and the combined layer formulation (CLF). Although the SLF and the DLF are prone to non-uniqueness at certain dis- crete frequencies of the incident wave, the CLF is problem-free, eliminates numerical artifacts, and provides a uniquesolution at all frequencies. Fur- ther, all the three formulations are surface formu- lations which implies that only the scatterer sur- face is discretized for the numerical solution. The numerical solution is obtained by approximating the fluid body surface by triangular patches and adopting the method of moments (MoM) solution procedure. Finally, several numerical examples have been presented to highlight the capabilities of the present work. Keyword: acoustic scattering, fluid bodies, ar- bitrary shape
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