Turbulent channel flow with periodic hill constrictions

Nikolaus Peller, Michael Manhart

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This paper presents a Direct Numerical Simulation (DNS) of turbulent channel flow with periodic hill constrictions at Re = 2808. For the DNS, special attention is paid to the grid design by analysis of the Kolmogorov length scale and the wall shear stress in order to be well resolved over the entire numerical domain. Therefore the DNS simulation provides data for a detailed study of physical flow phenomena and near-wall studies. Results for instantaneous and averaged flow fields are presented. An investigation of the near wall behaviour reveals the applicability of explicit wall models for Large Eddy Simulation (LES) in regions with high wall shear stress and a complete failure of conventional wall scaling in separation and reattachment regions where the wall shear stress is small.

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