Scaling of near-wall flows in quasi-two-dimensional turbulent channels
The law of the wall and the log law rule the near-wall mean velocity profile of three-dimensional turbulent flows. These well-known laws, which are validated by legions of experiments and simulations, may be universal. Here, using a soap-film channel, we report the first experimental test of these l...
| Main Authors: | , , , , , , |
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| 其他作者: | |
| 格式: | Journal Article |
| 語言: | English |
| 出版: |
2014
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/104662 http://hdl.handle.net/10220/20288 |
| _version_ | 1826122663022559232 |
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| author | Samanta, D. Ingremeau, F. Cerbus, R. Tran, T. Goldburg, W. I. Chakraborty, P. Kellay, H. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Samanta, D. Ingremeau, F. Cerbus, R. Tran, T. Goldburg, W. I. Chakraborty, P. Kellay, H. |
| author_sort | Samanta, D. |
| collection | NTU |
| description | The law of the wall and the log law rule the near-wall mean velocity profile of three-dimensional turbulent flows. These well-known laws, which are validated by legions of experiments and simulations, may be universal. Here, using a soap-film channel, we report the first experimental test of these laws in quasi-two-dimensional turbulent channel flows under two disparate turbulent spectra. We find that despite the differences with three-dimensional flows, the laws prevail, albeit with notable distinctions: the two parameters of the log law are markedly distinct from their three-dimensional counterpart; further, one parameter (the von Kármán constant) is independent of the spectrum whereas the other (the offset of the log law) depends on the spectrum. Our results suggest that the classical theory of scaling in wall-bounded turbulence is incomplete wherein a key missing element is the link with the turbulent spectrum. |
| first_indexed | 2024-10-01T05:52:10Z |
| format | Journal Article |
| id | ntu-10356/104662 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:52:10Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1046622023-03-04T17:17:47Z Scaling of near-wall flows in quasi-two-dimensional turbulent channels Samanta, D. Ingremeau, F. Cerbus, R. Tran, T. Goldburg, W. I. Chakraborty, P. Kellay, H. School of Mechanical and Aerospace Engineering DRNTU::Engineering::Aeronautical engineering The law of the wall and the log law rule the near-wall mean velocity profile of three-dimensional turbulent flows. These well-known laws, which are validated by legions of experiments and simulations, may be universal. Here, using a soap-film channel, we report the first experimental test of these laws in quasi-two-dimensional turbulent channel flows under two disparate turbulent spectra. We find that despite the differences with three-dimensional flows, the laws prevail, albeit with notable distinctions: the two parameters of the log law are markedly distinct from their three-dimensional counterpart; further, one parameter (the von Kármán constant) is independent of the spectrum whereas the other (the offset of the log law) depends on the spectrum. Our results suggest that the classical theory of scaling in wall-bounded turbulence is incomplete wherein a key missing element is the link with the turbulent spectrum. Published version 2014-08-15T02:20:39Z 2019-12-06T21:37:10Z 2014-08-15T02:20:39Z 2019-12-06T21:37:10Z 2014 2014 Journal Article Samanta, D., Ingremeau, F., Cerbus, R., Tran, T., Goldburg, W., Chakraborty, P., et al. (2014). Scaling of Near-Wall Flows in Quasi-Two-Dimensional Turbulent Channels. Physical Review Letters, 113(2), 024504-. 0031-9007 https://hdl.handle.net/10356/104662 http://hdl.handle.net/10220/20288 10.1103/PhysRevLett.113.024504 en Physical review letters © 2014 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: http://dx.doi.org/10.1103/PhysRevLett.113.024504. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Engineering::Aeronautical engineering Samanta, D. Ingremeau, F. Cerbus, R. Tran, T. Goldburg, W. I. Chakraborty, P. Kellay, H. Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title | Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title_full | Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title_fullStr | Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title_full_unstemmed | Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title_short | Scaling of near-wall flows in quasi-two-dimensional turbulent channels |
| title_sort | scaling of near wall flows in quasi two dimensional turbulent channels |
| topic | DRNTU::Engineering::Aeronautical engineering |
| url | https://hdl.handle.net/10356/104662 http://hdl.handle.net/10220/20288 |
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