Periodic orbits in large eddy simulation of box turbulence

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...

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Bibliographic Details
Published inFluid dynamics research Vol. 51; no. 1; pp. 11411 - 11420
Main Authors Veen, Lennaert van, Vela-Martín, Alberto, Kawahara, Genta, Yasuda, Tatsuya
Format Journal Article
LanguageEnglish
Published IOP Publishing 17.01.2019
Subjects
box turbulence
large eddy simulation
unstable periodic orbit
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Summary: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 (2014 Fluid Dyn. Res. 46 061413), 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.
Bibliography:The Japan Society of Fluid Mechanics
FDR-100695.R1
ISSN:0169-5983
1873-7005
1873-7005
DOI:10.1088/1873-7005/aac7ec