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A dynamic one-equation subgrid model for simulation of flow around a square cylinder

Sohankar, Ahmad ; Davidson, Lars and Norberg, Christoffer LU (1999) 4th International Symposium on Engineering Turbulence Modelling and Measurements 4. p.227-236
Abstract
Large Eddy Simulations (LESs) of flow around a square cylinder at Re = 22 × 103 are performed employing a dynamic one-equation subgrid model. An implicit fractional step method finite-volume code with second-order accuracy in space and time is used. By using a periodic boundary condition, the spanwise dimension is four times the side length of the cylinder. Some global quantities, such as the dominating wake frequency,(Strouhal number) and the mean and RMS values of lift and drag, are computed. Also, a series of time-and spanwise-averaged resolved velocities and turbulent stresses are provided for comparison with experiments. The influence of a finer grid on the results is investigated. Present results are in general agreement with... (More)
Large Eddy Simulations (LESs) of flow around a square cylinder at Re = 22 × 103 are performed employing a dynamic one-equation subgrid model. An implicit fractional step method finite-volume code with second-order accuracy in space and time is used. By using a periodic boundary condition, the spanwise dimension is four times the side length of the cylinder. Some global quantities, such as the dominating wake frequency,(Strouhal number) and the mean and RMS values of lift and drag, are computed. Also, a series of time-and spanwise-averaged resolved velocities and turbulent stresses are provided for comparison with experiments. The influence of a finer grid on the results is investigated. Present results are in general agreement with experiments and by using a finer spatial resolution, an even better agreement is found. The dynamic one-equation subgrid model is found to be stable and no sign of the numerical problems usually encountered with the standard dynamic SGS model is observed. (Less)
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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Engineering Turbulence Modelling and Experiments : 4th International Symposium on Engineering Modelling and Measurements, May 24-26, 1999, Ajaccio, France - 4th International Symposium on Engineering Modelling and Measurements, May 24-26, 1999, Ajaccio, France
volume
4
pages
227 - 236
publisher
Elsevier Science Publishers B.V.
conference name
4th International Symposium on Engineering Turbulence Modelling and Measurements
conference location
Ajaccio, Corsica, France
conference dates
1999-05-24 - 1999-05-26
ISBN
978-0-08-043328-8
DOI
10.1016/B978-008043328-8/50021-7
language
English
LU publication?
yes
id
14e3e2e4-8508-4eb8-93fd-2b26d18c0e14
date added to LUP
2023-02-15 17:49:52
date last changed
2025-04-04 15:21:12
@inproceedings{14e3e2e4-8508-4eb8-93fd-2b26d18c0e14,
  abstract     = {{Large Eddy Simulations (LESs) of flow around a square cylinder at Re = 22 × 103 are performed employing a dynamic one-equation subgrid model. An implicit fractional step method finite-volume code with second-order accuracy in space and time is used. By using a periodic boundary condition, the spanwise dimension is four times the side length of the cylinder. Some global quantities, such as the dominating wake frequency,(Strouhal number) and the mean and RMS values of lift and drag, are computed. Also, a series of time-and spanwise-averaged resolved velocities and turbulent stresses are provided for comparison with experiments. The influence of a finer grid on the results is investigated. Present results are in general agreement with experiments and by using a finer spatial resolution, an even better agreement is found. The dynamic one-equation subgrid model is found to be stable and no sign of the numerical problems usually encountered with the standard dynamic SGS model is observed.}},
  author       = {{Sohankar, Ahmad and Davidson, Lars and Norberg, Christoffer}},
  booktitle    = {{Engineering Turbulence Modelling and Experiments : 4th International Symposium on Engineering Modelling and Measurements, May 24-26, 1999, Ajaccio, France}},
  isbn         = {{978-0-08-043328-8}},
  language     = {{eng}},
  pages        = {{227--236}},
  publisher    = {{Elsevier Science Publishers B.V.}},
  title        = {{A dynamic one-equation subgrid model for simulation of flow around a square cylinder}},
  url          = {{https://lup.lub.lu.se/search/files/137954687/Sohankar_al_corsica_1999.pdf}},
  doi          = {{10.1016/B978-008043328-8/50021-7}},
  volume       = {{4}},
  year         = {{1999}},
}