On the use of variable order infinite wave envelope elements for acoustic radiation and scattering

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Abstract
The use of the variable order infinite wave envelope element to model acoustic radiation and scattering problems is investigated. Different acoustic modeling aspects are focused upon. These involve the modeling of acoustic wave propagation above infinite homogeneous impedance planes, different methods to prescribe acoustic sources and alternative postprocessing procedures. Special attention is given to limitations encountered for this finite element based modeling of wave propagation in unbounded domains. The limitations are assessed by analyzing the higher-order multipoles of the axisymmetric pulsating rigid sphere.

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