An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings
Accurate inflow turbulence wind profile is a key premise of large eddy simulation (LES) methodology for super tall buildings. This paper presents an improved method for narrow band synthesis random flow generation to produce a more accurate inflow turbulence of LES based on superposition of harmonic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2022.2155704 |
| _version_ | 1797403928601559040 |
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| author | Ting Deng Zhiwei Chen Ji-Yang Fu Yi Li |
| author_facet | Ting Deng Zhiwei Chen Ji-Yang Fu Yi Li |
| author_sort | Ting Deng |
| collection | DOAJ |
| description | Accurate inflow turbulence wind profile is a key premise of large eddy simulation (LES) methodology for super tall buildings. This paper presents an improved method for narrow band synthesis random flow generation to produce a more accurate inflow turbulence of LES based on superposition of harmonics. The proposed method considers time correlation by adopting time parameters, and an accurate expression of wind speed spectrum energy by a modified spectrum integral equation is used. These improvements could generate a more accurate turbulence intensity for the atmospheric boundary layer. A simple numerical example is applied to verify the spectrum characteristic, time correlation and spatial correlation of atmospheric numerical boundary layer. Meanwhile, the effects of the introduced parameters are investigated and the method is applied to the LES of the Commonwealth Advisory Aeronautical Research Council building (CAARC). The improved method could increase the accuracy of simulated turbulence intensity. Compared with the results of CAARC model obtained from the wind tunnel test, the improved method in this study decreases the errors of root-mean-square (rms) of the based bending moment from 5.3% to 4.1% in the along-wind direction and from 5.6% to 1.3% in the cross-wind direction. |
| first_indexed | 2024-03-09T02:46:36Z |
| format | Article |
| id | doaj.art-b76ad7cda2e7402cb620ce65a2661972 |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-03-09T02:46:36Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-b76ad7cda2e7402cb620ce65a26619722023-12-05T16:53:44ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2023-12-0117110.1080/19942060.2022.2155704An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildingsTing Deng0Zhiwei Chen1Ji-Yang Fu2Yi Li3Research Center of Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou, People’s Republic of ChinaRBS Architecture Engineering Design Associates, Guangzhou, People’s Republic of ChinaResearch Center of Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou, People’s Republic of ChinaResearch Center of Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou, People’s Republic of ChinaAccurate inflow turbulence wind profile is a key premise of large eddy simulation (LES) methodology for super tall buildings. This paper presents an improved method for narrow band synthesis random flow generation to produce a more accurate inflow turbulence of LES based on superposition of harmonics. The proposed method considers time correlation by adopting time parameters, and an accurate expression of wind speed spectrum energy by a modified spectrum integral equation is used. These improvements could generate a more accurate turbulence intensity for the atmospheric boundary layer. A simple numerical example is applied to verify the spectrum characteristic, time correlation and spatial correlation of atmospheric numerical boundary layer. Meanwhile, the effects of the introduced parameters are investigated and the method is applied to the LES of the Commonwealth Advisory Aeronautical Research Council building (CAARC). The improved method could increase the accuracy of simulated turbulence intensity. Compared with the results of CAARC model obtained from the wind tunnel test, the improved method in this study decreases the errors of root-mean-square (rms) of the based bending moment from 5.3% to 4.1% in the along-wind direction and from 5.6% to 1.3% in the cross-wind direction.https://www.tandfonline.com/doi/10.1080/19942060.2022.2155704Atmospheric boundary layertime correlationspectrum energy modificationsuper tall buildingwind load |
| spellingShingle | Ting Deng Zhiwei Chen Ji-Yang Fu Yi Li An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings Engineering Applications of Computational Fluid Mechanics Atmospheric boundary layer time correlation spectrum energy modification super tall building wind load |
| title | An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| title_full | An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| title_fullStr | An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| title_full_unstemmed | An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| title_short | An improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| title_sort | improved inflow turbulence generator for large eddy simulation evaluation of wind effects on tall buildings |
| topic | Atmospheric boundary layer time correlation spectrum energy modification super tall building wind load |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2022.2155704 |
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