Turbulent channel flow at Reτ=10000.

ORAL

Abstract

A new simulation of a turbulent channel flow was conducted up to the limit of Re_\tau=10.000. The domain size is 2π×2h×π. This domain is thought to be large enough to accurately compute the one point statistics of the flow. The simulation is carried out on 2048 SuperMUC phase II cores, at a mesh of (6144, 2101, 6144)≈8×10e10 grid points. A database with approximately 75 TB has already been created, which will be analyzed further at a later stage. As it was expected, a long logarithmic layer exists with κ\approx 0.40 and extending from y+≈70 to y+≈2000. The first maximum of the indicator function is not growing anymore and remains constant. A first analysis of the intensities shows that the near wall peaks of u′, w' and p' are still growing with Reynolds number. The possible secondary maximum of u is barely present. New scaling laws of U and u' based on symmetry theory will be also shown.

*This work was partially supported by MINECO/FEDER, under Project No. ENE2015-71333-R. The work of M. Oberlack was supported by the German Research Foundation (DFG) under the Grant No. OB96/39-1. The computations of the new simulations were made possible by a generous grant of computing time from the SuperMUC Petascale System at the Leibniz Supercomputing Centre (LRZ) under project-ID pr92la.

Presenters

  • Sergio Hoyas

    • Univ Politecnica de Valencia

Authors

  • Sergio Hoyas

    • Univ Politecnica de Valencia
  • Martin Oberlack

    • Tech Univ Darmstadt
    • Technical University of Darmstadt
  • Stefanie Kraheberger

    • TU Darmstadt
  • Francisco Alcantara-Avila

    • IUMPA, Universitat Politècnica de València