Simulations of a turbulent flow past a sudden expansion: A sensitivity analysis
(2008) In AIAA Journal 46(2). p.408-419- 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 one of the walls. The large eddy simulation results are compared with laser Doppler anemometry measurements showing the ability of the present numerical tool to capture the complex features of the flow. Furthermore, a sensitivity study is conducted to assess the influence of the grid resolution, the inflow boundary, the channel width, and the step size on the flowfield. The flow was found to be only weakly sensitive to the grid, assuring the quality of the simulation results. The inflow boundary influences the mean results... (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 one of the walls. The large eddy simulation results are compared with laser Doppler anemometry measurements showing the ability of the present numerical tool to capture the complex features of the flow. Furthermore, a sensitivity study is conducted to assess the influence of the grid resolution, the inflow boundary, the channel width, and the step size on the flowfield. The flow was found to be only weakly sensitive to the grid, assuring the quality of the simulation results. The inflow boundary influences the mean results only marginally unless low-frequency fluctuations are applied. In this case, the flowfield recovers a mean symmetry with suppression of the jet bending. The jet mean bending has also been shown to increase with the step size h and to decrease with increasing channel width. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1199228
- author
- Duwig, Christophe LU ; Salewski, Mirko LU and Fuchs, Laszlo LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- AIAA Journal
- volume
- 46
- issue
- 2
- pages
- 408 - 419
- publisher
- American Institute of Aeronautics and Astronautics
- external identifiers
-
- wos:000252822800012
- scopus:43649083196
- ISSN
- 1533-385X
- DOI
- 10.2514/1.30149
- language
- English
- LU publication?
- yes
- id
- 1409d2ef-fe3f-4dfa-8263-58df048cc14c (old id 1199228)
- date added to LUP
- 2016-04-01 11:50:48
- date last changed
- 2022-03-13 01:33:55
@article{1409d2ef-fe3f-4dfa-8263-58df048cc14c,
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 one of the walls. The large eddy simulation results are compared with laser Doppler anemometry measurements showing the ability of the present numerical tool to capture the complex features of the flow. Furthermore, a sensitivity study is conducted to assess the influence of the grid resolution, the inflow boundary, the channel width, and the step size on the flowfield. The flow was found to be only weakly sensitive to the grid, assuring the quality of the simulation results. The inflow boundary influences the mean results only marginally unless low-frequency fluctuations are applied. In this case, the flowfield recovers a mean symmetry with suppression of the jet bending. The jet mean bending has also been shown to increase with the step size h and to decrease with increasing channel width.}},
author = {{Duwig, Christophe and Salewski, Mirko and Fuchs, Laszlo}},
issn = {{1533-385X}},
language = {{eng}},
number = {{2}},
pages = {{408--419}},
publisher = {{American Institute of Aeronautics and Astronautics}},
series = {{AIAA Journal}},
title = {{Simulations of a turbulent flow past a sudden expansion: A sensitivity analysis}},
url = {{http://dx.doi.org/10.2514/1.30149}},
doi = {{10.2514/1.30149}},
volume = {{46}},
year = {{2008}},
}