Complex source distributions in wave-based virtual acoustics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the typical scenario in time-domain wave-based acoustics, the solution to the acoustic wave equation is approximated over a three-dimensional volumetric grid using a time stepping method. In the setting of very large simulations, the grid is normally assumed to be regular (e.g. Cartesian) so that massive parallelism may be exploited. One difficulty has been in representing source distributions that do not conform neatly to a regular grid. Using a Fourier-based optimisation procedure in the wave vector domain, it is possible to represent arbitrary source distributions in a flexible way over a pre-defined collection of grid points. Such a methodology is independent of the particular choice of simulation method and depends only on the regularity of the grid. In this paper, approximations to various simple distributions, including the line source and piston, are examined, with regard to accuracy, rotation of the distribution relative to the grid, and the size of the point cloud used to represent the source. Numerical results are presented.
Original languageEnglish
Title of host publicationProceedings of Internoise 2023
Place of PublicationChiba, Japan
PublisherInstitute of Noise Control Engineering
Pages4706-4716
Number of pages11
DOIs
Publication statusPublished - 30 Nov 2023
EventInternoise - Chiba, Japan
Duration: 20 Aug 202323 Aug 2023

Publication series

NameINTER-NOISE and NOISE-CON Congress and Conference Proceedings
ISSN (Print)0736-2935

Conference

ConferenceInternoise
Country/TerritoryJapan
CityChiba
Period20/08/2323/08/23

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