A sponge layer for accurate aeroacoustic simulations using high-order discontinuous galerkin methods

Hiroyuki Asada, Yoshifumi Ogami

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

Abstract

Performances of a sponge layer for non-reflective treatment are numerically assessed on aeroacoustic simulations using high-order discontinuous Galerkin (DG) methods. Particularly, effects of grid parameters in the sponge layer on the sponge performances are carefully investigated through high-order simulations of the vortex/sponge interaction with the tenth-order DG method. After exploring the optimal sponge parameters, it is found that the sponge layer has an ability to suppress spurious high frequency acoustic waves occurring when the vortex is under-resolved and that the grid in the sponge layer can be coarse. On the other hand, it is also shown that too coarse mesh results in the remains of the spurious waves, which indicates that there are the optimal parameters for the sponge grid.

Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
DOIs
Publication statusPublished - 2019
Externally publishedYes
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: 2019 Jan 72019 Jan 11

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego
Period19/1/719/1/11

ASJC Scopus subject areas

  • Aerospace Engineering

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