High-order cellwise relaxation implicit discontinuous galerkin scheme for unsteady flow computations

Hiroyuki Asada, Soshi Kawai, Keisuke Sawada

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

Abstract

A performance of high-order Cellwise Relaxation Implicit Discontinuous Galerkin (DG-CRI) scheme on unsteady ow computation is investigated. The inviscid Taylor-Green vortex is first computed to demonstrate the capability of the high-order DG-CRI scheme on the homogeneous turbulence computation. The higher-order DG-CRI scheme gives better resolved small vortex structures, which is well indicated in the later decay of the kinetic energy and the higher enstrophy. In addition, the effects of the CFL number and the number of inner iterations are discussed by comparing with the results by explicit time integration. Then, the high-order DG method is applied for the LES computation of the turbulent channel ow, and the advantages of the high-order DG method in predicting accurate turbulent statistics are shown.

Original languageEnglish
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
DOIs
Publication statusPublished - 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: 2016 Jan 42016 Jan 8

Publication series

Name54th AIAA Aerospace Sciences Meeting
Volume0

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period16/1/416/1/8

ASJC Scopus subject areas

  • Aerospace Engineering

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