Abstr:2D Periodic Hill Flow
Semi-Confined Flows
Underlying Flow Regime 3-30
Abstract
The flow over periodically arranged hills at Reynolds numbers from 5,600 to 37,000 has been investigated experimentally and numerically. Since Mellen et al. (2000) presented this flow case its geometry has been used for various studies and has served as a benchmark case in different research groups. The flow features phenomena such as separation from a curved surface, recirculation and natural reattachment. It can be simulated at relatively low computational cost because of the periodic boundary conditions and the two-dimensionality. DNS have been performed up to Re=5,600 (based on the bulk velocity above the hill and the hill height) [Peller and Manhart (2005)] whereas numerous LES works were published for Re=10,600 [e.g. Fröhlich et al. (2005), Breuer et al. (2009), Temmerman and Leschziner (2001)]. Recently LES results were presented for Re=37,000. A physical experiment has been thoroughly set up in the Laboratory for Hydromechanics of the Technische Universität München to investigate the flow experimentally and provide reliable reference data.
Contributed by: Christoph Rapp — Technische Universitat Munchen
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