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Periodic orbits in Large Eddy Simulation of Box Turbulence
- Publication Year :
- 2018
-
Abstract
- We describe and compare two time-periodic flows embedded in Large Eddy Simulation (LES) of turbulence in a three-dimensional, periodic domain subject to constant external forcing. One of these flows models the regeneration of large-scale structures that was observed in this geometry by Yasuda et al. ({\sl Fluid Dyn. Res.} {\bf 46}, 061413, 2014), who used a smaller LES filter length and thus obtained a greater separation of scales of coherent motion. We speculate on the feasibility of modelling the regenerative dynamics with time-periodic solutions in such a flow, which may require novel techniques to deal with the extreme ill-conditioning of the associated boundary value problems.
- Subjects :
- Physics - Fluid Dynamics
76F05, 76F20
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1802.00845
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1873-7005/aac7ec