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Box-size dependence and breaking of translational invariance in the velocity statistics computed from three-dimensional turbulent Kolmogorov flows

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Sarris, I. E. Jeanmart, Hervé [UCL] Carati, Daniele Winckelmans, Grégoire [UCL]

The Kolmogorov flow generated by a stationary one-dimensional forcing varying sinusoidally in space is studied using direct numerical simulations with periodic boundary conditions. The velocity statistics are considered for various computational domains ranging from the minimal cubic box with size equal to the forcing wavelength to significantly larger domains. For the minimal computational domain, the velocity statistics exhibit symmetries that are directly imposed by the forcing properties. However, for larger domains, the translational invariance in the streamwise direction appears to be broken and the turbulence statistics depend on the computational box aspect ratio. (c) 2007 American Institute of Physics.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2007
Language Anglais
Journal information "Physics of Fluids" - Vol. 19, no. 9 (2007)
Peer reviewed yes
Publisher Amer Inst Physics (Melville)
issn 1070-6631
e-issn 1089-7666
Publication status Publié
Affiliation UCL - FSA/MECA - Département de mécanique
Links
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Bibliographic reference Sarris, I. E. ; Jeanmart, Hervé ; Carati, Daniele ; Winckelmans, Grégoire. Box-size dependence and breaking of translational invariance in the velocity statistics computed from three-dimensional turbulent Kolmogorov flows. In: Physics of Fluids, Vol. 19, no. 9 (2007)
Permanent URL http://hdl.handle.net/2078.1/37219