High-Order Flux Reconstruction Schemes for LES on Tetrahedral Meshes
2014 (English)In: Progress in Hybrid RANS-LES Modelling: Volume 130 of the series Notes on Numerical Fluid Mechanics and Multidisciplinary Design / [ed] Sharath Girimaji, Werner Haase, Shia-Hui Peng, Dieter Schwamborn, 2014Conference paper (Refereed)
The use of the high-order Flux Reconstruction (FR) spatial discretization scheme for LES on unstructured meshes is investigated. Simulations of the compressible Taylor-Green vortex at Re=1,600 demonstrate that the FR scheme has low numerical dissipation and accurately reproduces the turbulent energy cascade at low resolution, making it ideal for high-order LES. To permit the use of subgrid-scale models incorporating explicit filtering on tetrahedral meshes, a high-order filter acting on the modal form of the solution (i.e. the Dubiner basis functions) is developed. The WALE-Similarity mixed (WSM) model using this filter is employed for LES of the flow over a square cylinder at Re=21,400, obtaining reasonable agreement with experiments. Future research will be directed at improved SGS models and filters and at developing high-order hybrid RANS/LES methods.
Place, publisher, year, edition, pages
fluid dynamics, high order, flux reconstruction, large eddy simulation, turbulence
Aerospace Engineering Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:uu:diva-264307DOI: 10.1007/978-3-319-15141-0_5ISBN: 978-3-319-15141-0OAI: oai:DiVA.org:uu-264307DiVA: diva2:859933
5th Symposium on Hybrid RANS-LES Methods, 19-21 March 2014, College Station, A&M University, Texas, USA