The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Large Eddy Simulation of a turbulent flow past a pair of symmetric backward-facing steps: A sensitivity analysis

På svenska

Author

  • Christophe Duwig
  • Mirko Salewski
  • Laszlo Fuchs

Summary, in English

Large Eddy Simulation is used to study the flow behind a pair of symmetric backward facing steps. As reported in the literature, the flow exhibits an asymmetric pattern characterized by the deflection of the jet toward of the walls. The LES results are compared to LDA measurements showing the ability of the present numerical tool to capture the complex features of the flow. Furthermore, a sensitivity study is conducted in order to assess the influence of the grid resolution, inflow boundary, channel width (aspect ratio A <sub>h</sub>) and step size (h) on the flow field. The flow was found to be weakly sensitive to the grid, assuring the quality of the simulation results. The inflow boundary influences the results only marginally unless low frequency fluctuations are applied. In this case, the flow field recovers symmetry with suppression of the jet bending. The jet bending has also been shown to increase with the step size h and to reduce with increasing A<sub>h</sub>.

Department/s

Publishing year

2007

Language

English

Pages

11096-11114

Publication/Series

Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting

Volume

16

Document type

Conference paper

Publisher

American Institute of Aeronautics and Astronautics

Topic

  • Fluid Mechanics and Acoustics

Keywords

  • Inflow boundary
  • Jet bending
  • Grid resolution

Conference name

45th AIAA Aerospace Sciences Meeting 2007

Conference date

2007-01-08 - 2007-01-11

Conference place

Reno, NV, United States

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-1-56347-890-1