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.
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Presenters
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Sergio Hoyas
- Univ Politecnica de Valencia