Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer
In the past half century, large eddy simulations (LESs) have played an important role in turbulent flow simulation and improving the performance of computing technology. To generate a fully developed turbulent boundary layer in the channel domain using LES, suitable inflow conditions along with turb...
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/11/5177 |
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| author | Young-Tae Lee Lokesh Kalyan Gutti Hee-Chang Lim |
| author_facet | Young-Tae Lee Lokesh Kalyan Gutti Hee-Chang Lim |
| author_sort | Young-Tae Lee |
| collection | DOAJ |
| description | In the past half century, large eddy simulations (LESs) have played an important role in turbulent flow simulation and improving the performance of computing technology. To generate a fully developed turbulent boundary layer in the channel domain using LES, suitable inflow conditions along with turbulent characteristics are required. This study aimed to clarify the effect of the integral length scale on the generation of turbulent boundary layers. To accomplish this, an artificially created boundary layer was imposed on the inlet section, which gradually evolved into a fully developed turbulent boundary layer flow inside the numerical domain. In this study, the synthetic inflow method, which is a commonly employed technique, was used by imposing the spatial and temporal correlation between two different points on the inlet section. In addition, we conducted parametric length scale studies on the inlet section and compared our results with existing data. The results showed that the larger length scales in the spanwise direction were not only effective in achieving the target shape of a fully developed turbulent boundary layer, but also developed it faster than the smaller length scales. |
| first_indexed | 2024-03-10T10:45:59Z |
| format | Article |
| id | doaj.art-8ea0b6d694fb44ae9723308e4c1c9d4a |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:45:59Z |
| publishDate | 2021-06-01 |
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| series | Applied Sciences |
| spelling | doaj.art-8ea0b6d694fb44ae9723308e4c1c9d4a2023-11-21T22:35:31ZengMDPI AGApplied Sciences2076-34172021-06-011111517710.3390/app11115177Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary LayerYoung-Tae Lee0Lokesh Kalyan Gutti1Hee-Chang Lim2National Institute of Meteorological Sciences Operational Systems Development Department, 145, Seohojungang-ro, Seogwipo-si 63568, Jeju-do, KoreaSchool of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, KoreaSchool of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, KoreaIn the past half century, large eddy simulations (LESs) have played an important role in turbulent flow simulation and improving the performance of computing technology. To generate a fully developed turbulent boundary layer in the channel domain using LES, suitable inflow conditions along with turbulent characteristics are required. This study aimed to clarify the effect of the integral length scale on the generation of turbulent boundary layers. To accomplish this, an artificially created boundary layer was imposed on the inlet section, which gradually evolved into a fully developed turbulent boundary layer flow inside the numerical domain. In this study, the synthetic inflow method, which is a commonly employed technique, was used by imposing the spatial and temporal correlation between two different points on the inlet section. In addition, we conducted parametric length scale studies on the inlet section and compared our results with existing data. The results showed that the larger length scales in the spanwise direction were not only effective in achieving the target shape of a fully developed turbulent boundary layer, but also developed it faster than the smaller length scales.https://www.mdpi.com/2076-3417/11/11/5177large eddy simulationsynthetic inflow generatorintegral length scalechannel flowturbulent boundary layerCFD |
| spellingShingle | Young-Tae Lee Lokesh Kalyan Gutti Hee-Chang Lim Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer Applied Sciences large eddy simulation synthetic inflow generator integral length scale channel flow turbulent boundary layer CFD |
| title | Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer |
| title_full | Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer |
| title_fullStr | Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer |
| title_full_unstemmed | Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer |
| title_short | Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer |
| title_sort | numerical study of the influence of the inlet turbulence length scale on the turbulent boundary layer |
| topic | large eddy simulation synthetic inflow generator integral length scale channel flow turbulent boundary layer CFD |
| url | https://www.mdpi.com/2076-3417/11/11/5177 |
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