Small-scale statistics in direct numerical simulation of turbulent channel flow at high-Reynolds number

Koji Morishita, Takashi Ishihara, Yukio Kaneda

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

Small-scale statistics in turbulent channel flow are studied by high resolution direct numerical simulations with the friction Reynolds number up to Reτ = 2560. The second order velocity statistics in the inertial subrange of the log-low region are found to be not far from those predicted by Kolmogorov's universal equilibrium theory, although the agreement is not perfect. The shear parameter S* decreases with the distance y+ from the wall and S* ≲ 0.1 in y+ > 400 for large Reτ, where S* is the ratio of the Kolmogorov time scale to the mean shear time scale. For larger Reτ, the y +-dependence of S* is closer to a simple theoretical estimate in the log-low region.

Original languageEnglish
Article number022016
JournalJournal of Physics: Conference Series
Volume318
Issue numberSECTION 2
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event13th European Turbulence Conference, ETC13 - Warsaw, Poland
Duration: Sep 12 2011Sep 15 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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