Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage
This work experimentally investigates the turbulent flow characteristics of developing and fully-developed flows over a rough bed channel that is subjected to downward seepage. Instantaneous 3D velocities were collected using an acoustic Doppler velocimeter (ADV) in the developing and fully-develope...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/3/500 |
| _version_ | 1797483930527465472 |
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| author | Anurag Sharma Bimlesh Kumar Giuseppe Oliveto |
| author_facet | Anurag Sharma Bimlesh Kumar Giuseppe Oliveto |
| author_sort | Anurag Sharma |
| collection | DOAJ |
| description | This work experimentally investigates the turbulent flow characteristics of developing and fully-developed flows over a rough bed channel that is subjected to downward seepage. Instantaneous 3D velocities were collected using an acoustic Doppler velocimeter (ADV) in the developing and fully-developed flow regions, along the channel centerline, to analyze different turbulent statistics. Observations revealed that the streamwise and vertical velocities were higher in developing flows, whereas the Reynolds shear stresses, and turbulence intensities, were smaller. The downward seepage would affect the velocity distributions and flow depth in both the developing and fully-developed regions. Therefore, new equations to represent the distribution of the turbulence intensities were proposed, and a comparison with the current literature is provided. The investigation of the Reynolds stress anisotropy tensors concludes that the degree of anisotropy in fully-developed flows is lower than for developing flows. |
| first_indexed | 2024-03-09T22:55:04Z |
| format | Article |
| id | doaj.art-55c9c42557f34bf1a7c6f4fa7ca0311c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T22:55:04Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-55c9c42557f34bf1a7c6f4fa7ca0311c2023-11-23T18:12:55ZengMDPI AGWater2073-44412022-02-0114350010.3390/w14030500Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward SeepageAnurag Sharma0Bimlesh Kumar1Giuseppe Oliveto2Department of Civil Engineering, National Institute of Technology Rourkela, Rourkela 769008, IndiaDepartment of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, IndiaSchool of Engineering, University of Basilicata, Viale dell’Ateneo Lucano 10, 85100 Potenza, ItalyThis work experimentally investigates the turbulent flow characteristics of developing and fully-developed flows over a rough bed channel that is subjected to downward seepage. Instantaneous 3D velocities were collected using an acoustic Doppler velocimeter (ADV) in the developing and fully-developed flow regions, along the channel centerline, to analyze different turbulent statistics. Observations revealed that the streamwise and vertical velocities were higher in developing flows, whereas the Reynolds shear stresses, and turbulence intensities, were smaller. The downward seepage would affect the velocity distributions and flow depth in both the developing and fully-developed regions. Therefore, new equations to represent the distribution of the turbulence intensities were proposed, and a comparison with the current literature is provided. The investigation of the Reynolds stress anisotropy tensors concludes that the degree of anisotropy in fully-developed flows is lower than for developing flows.https://www.mdpi.com/2073-4441/14/3/500developing flowfully-developed flowReynolds stress anisotropy tensorseepage flowturbulence intensity |
| spellingShingle | Anurag Sharma Bimlesh Kumar Giuseppe Oliveto Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage Water developing flow fully-developed flow Reynolds stress anisotropy tensor seepage flow turbulence intensity |
| title | Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage |
| title_full | Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage |
| title_fullStr | Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage |
| title_full_unstemmed | Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage |
| title_short | Turbulent Flow Structures in Developing and Fully-Developed Flows under the Impact of Downward Seepage |
| title_sort | turbulent flow structures in developing and fully developed flows under the impact of downward seepage |
| topic | developing flow fully-developed flow Reynolds stress anisotropy tensor seepage flow turbulence intensity |
| url | https://www.mdpi.com/2073-4441/14/3/500 |
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