1. Periodic orbits in Large Eddy Simulation of Box Turbulence
- Author
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van Veen, Lennaert, Martin, Alberto Vela, Kawahara, Genta, and Yasuda, Tatsuya
- Subjects
Physics - Fluid Dynamics ,76F05, 76F20 - 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.
- Published
- 2018
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