Temporal Stabilisation of Flux Reconstruction on Linear Problems

Will Trojak, Rob Watson, Paul G. Tucker

Research output: Contribution to conferencePaper

1 Citation (Scopus)
169 Downloads (Pure)

Abstract

Filtering is often used in Large Eddy Simulation with a global filter width, instead here a filter width in the reference domain of high order Flux Reconstruction is considered. It is shown via Von Neumann analysis how filtering effects the dispersion and dissipation of the scheme when spatially and temporally discretised. With it being shown that filtering stabilises the scheme temporally by upto $25\%$ for forth order FR. The impact of filtering on error production is calculated, highlighting the reduction in convective velocity caused and showing numerically the impact on order of accuracy. Finally, the turbulent Taylor-Green case is used to understand the effect of reference domain filtering on the transition to turbulence, and a filter Reynolds number is defined that is shown to be useful in understanding the effect of filtering on simulations.
Original languageEnglish
DOIs
Publication statusPublished - 29 Jun 2018
EventAIAA Aviation Forum 2018 - Atlanta, United States
Duration: 25 Jun 201829 Jun 2018

Conference

ConferenceAIAA Aviation Forum 2018
CountryUnited States
CityAtlanta
Period25/06/201829/06/2018

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    Trojak, W., Watson, R., & Tucker, P. G. (2018). Temporal Stabilisation of Flux Reconstruction on Linear Problems. Paper presented at AIAA Aviation Forum 2018, Atlanta, United States. https://doi.org/10.2514/6.2018-4263