Large Eddy Simulation of a turbulent flow past a pair of symmetric backward-facing steps: A sensitivity analysis
(2007) 45th AIAA Aerospace Sciences Meeting 2007 16. p.11096-11114- Abstract
- 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... (More)
- 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>. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/643458
- author
- Duwig, Christophe LU ; Salewski, Mirko LU and Fuchs, Laszlo LU
- organization
- publishing date
- 2007
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Inflow boundary, Jet bending, Grid resolution
- host publication
- Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
- volume
- 16
- pages
- 11096 - 11114
- publisher
- American Institute of Aeronautics and Astronautics
- conference name
- 45th AIAA Aerospace Sciences Meeting 2007
- conference location
- Reno, NV, United States
- conference dates
- 2007-01-08 - 2007-01-11
- external identifiers
-
- scopus:34250872176
- ISBN
- 978-1-56347-890-1
- language
- English
- LU publication?
- yes
- id
- 51f2a0d3-d092-4a9a-abf8-83d7386a51f6 (old id 643458)
- date added to LUP
- 2016-04-04 12:13:51
- date last changed
- 2022-01-29 23:08:48
@inproceedings{51f2a0d3-d092-4a9a-abf8-83d7386a51f6, abstract = {{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>.}}, author = {{Duwig, Christophe and Salewski, Mirko and Fuchs, Laszlo}}, booktitle = {{Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting}}, isbn = {{978-1-56347-890-1}}, keywords = {{Inflow boundary; Jet bending; Grid resolution}}, language = {{eng}}, pages = {{11096--11114}}, publisher = {{American Institute of Aeronautics and Astronautics}}, title = {{Large Eddy Simulation of a turbulent flow past a pair of symmetric backward-facing steps: A sensitivity analysis}}, volume = {{16}}, year = {{2007}}, }