Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body
A detailed numerical investigation of the flow behind a square cylinder at a Reynolds number of 21,400 is conducted to assess the ability of the delayed detached-eddy simulation (DDES) modeling approach to accurately predict the velocity recovery in the wake of a bluff body. Three-dimensional unstea...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-08-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/4/3/41 |
| _version_ | 1818022450873499648 |
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| author | Matthieu Boudreau Guy Dumas Jean-Christophe Veilleux |
| author_facet | Matthieu Boudreau Guy Dumas Jean-Christophe Veilleux |
| author_sort | Matthieu Boudreau |
| collection | DOAJ |
| description | A detailed numerical investigation of the flow behind a square cylinder at a Reynolds number of 21,400 is conducted to assess the ability of the delayed detached-eddy simulation (DDES) modeling approach to accurately predict the velocity recovery in the wake of a bluff body. Three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) and DDES simulations making use of the Spalart–Allmaras turbulence model are carried out using the open-source computational fluid dynamics (CFD) toolbox OpenFOAM-2.1.x, and are compared with available experimental velocity measurements. It is found that the DDES simulation tends to overestimate the averaged streamwise velocity component, especially in the near wake, but a better agreement with the experimental data is observed further downstream of the body. The velocity fluctuations also match reasonably well with the experimental data. Moreover, it is found that the spanwise domain length has a significant impact on the flow, especially regarding the fluctuations of the drag coefficient. Nonetheless, for both the averaged and fluctuating velocity components, the DDES approach is shown to be superior to the URANS approach. Therefore, for engineering purposes, it is found that the DDES approach is a suitable choice to simulate and characterize the velocity recovery in a wake. |
| first_indexed | 2024-12-10T03:28:38Z |
| format | Article |
| id | doaj.art-12ba84bd3cb0443a9cae037848e6f34f |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-12-10T03:28:38Z |
| publishDate | 2017-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-12ba84bd3cb0443a9cae037848e6f34f2022-12-22T02:03:52ZengMDPI AGAerospace2226-43102017-08-01434110.3390/aerospace4030041aerospace4030041Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff BodyMatthieu Boudreau0Guy Dumas1Jean-Christophe Veilleux2CFD Laboratory LMFN, Département de Génie Mécanique, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, CanadaCFD Laboratory LMFN, Département de Génie Mécanique, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, CanadaGraduate Aerospace Laboratories, California Institute of Technology, Pasadena, CA 91125, USAA detailed numerical investigation of the flow behind a square cylinder at a Reynolds number of 21,400 is conducted to assess the ability of the delayed detached-eddy simulation (DDES) modeling approach to accurately predict the velocity recovery in the wake of a bluff body. Three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) and DDES simulations making use of the Spalart–Allmaras turbulence model are carried out using the open-source computational fluid dynamics (CFD) toolbox OpenFOAM-2.1.x, and are compared with available experimental velocity measurements. It is found that the DDES simulation tends to overestimate the averaged streamwise velocity component, especially in the near wake, but a better agreement with the experimental data is observed further downstream of the body. The velocity fluctuations also match reasonably well with the experimental data. Moreover, it is found that the spanwise domain length has a significant impact on the flow, especially regarding the fluctuations of the drag coefficient. Nonetheless, for both the averaged and fluctuating velocity components, the DDES approach is shown to be superior to the URANS approach. Therefore, for engineering purposes, it is found that the DDES approach is a suitable choice to simulate and characterize the velocity recovery in a wake.https://www.mdpi.com/2226-4310/4/3/41wakebluff bodysquare cylinderDDESURANSturbulence model |
| spellingShingle | Matthieu Boudreau Guy Dumas Jean-Christophe Veilleux Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body Aerospace wake bluff body square cylinder DDES URANS turbulence model |
| title | Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body |
| title_full | Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body |
| title_fullStr | Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body |
| title_full_unstemmed | Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body |
| title_short | Assessing the Ability of the DDES Turbulence Modeling Approach to Simulate the Wake of a Bluff Body |
| title_sort | assessing the ability of the ddes turbulence modeling approach to simulate the wake of a bluff body |
| topic | wake bluff body square cylinder DDES URANS turbulence model |
| url | https://www.mdpi.com/2226-4310/4/3/41 |
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