Energy Loss in Steep Open Channels with Step-Pools
Three-dimensional numerical simulations were performed for different flow rates and various geometrical parameters of step-pools in steep open channels to gain insight into the occurrence of energy loss and its dependence on the flow structure. For a given channel with step-pools, energy loss varied...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/1/72 |
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| author | Suresh Kumar Thappeta S. Murty Bhallamudi Venu Chandra Peter Fiener Abul Basar M. Baki |
| author_facet | Suresh Kumar Thappeta S. Murty Bhallamudi Venu Chandra Peter Fiener Abul Basar M. Baki |
| author_sort | Suresh Kumar Thappeta |
| collection | DOAJ |
| description | Three-dimensional numerical simulations were performed for different flow rates and various geometrical parameters of step-pools in steep open channels to gain insight into the occurrence of energy loss and its dependence on the flow structure. For a given channel with step-pools, energy loss varied only marginally with increasing flow rate in the nappe and transition flow regimes, while it increased in the skimming regime. Energy loss is positively correlated with the size of the recirculation zone, velocity in the recirculation zone and the vorticity. For the same flow rate, energy loss increased by 31.6% when the horizontal face inclination increased from 2° to 10°, while it decreased by 58.6% when the vertical face inclination increased from 40° to 70°. In a channel with several step-pools, cumulative energy loss is linearly related to the number of step-pools, for nappe and transition flows. However, it is a nonlinear function for skimming flows. |
| first_indexed | 2024-03-10T13:36:22Z |
| format | Article |
| id | doaj.art-f4c574db345247ff8f7004bfd84dcce7 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T13:36:22Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-f4c574db345247ff8f7004bfd84dcce72023-11-21T07:32:01ZengMDPI AGWater2073-44412020-12-011317210.3390/w13010072Energy Loss in Steep Open Channels with Step-PoolsSuresh Kumar Thappeta0S. Murty Bhallamudi1Venu Chandra2Peter Fiener3Abul Basar M. Baki4Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer Sheva 84105, IsraelDepartment of Civil Engineering, Indian Institute of Technology, Madras 600036, IndiaDepartment of Civil Engineering, Indian Institute of Technology, Madras 600036, IndiaInstitute for Geography, University of Augsburg, Alter Postweg 118, 86159 Augsburg, GermanyDepartment of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USAThree-dimensional numerical simulations were performed for different flow rates and various geometrical parameters of step-pools in steep open channels to gain insight into the occurrence of energy loss and its dependence on the flow structure. For a given channel with step-pools, energy loss varied only marginally with increasing flow rate in the nappe and transition flow regimes, while it increased in the skimming regime. Energy loss is positively correlated with the size of the recirculation zone, velocity in the recirculation zone and the vorticity. For the same flow rate, energy loss increased by 31.6% when the horizontal face inclination increased from 2° to 10°, while it decreased by 58.6% when the vertical face inclination increased from 40° to 70°. In a channel with several step-pools, cumulative energy loss is linearly related to the number of step-pools, for nappe and transition flows. However, it is a nonlinear function for skimming flows.https://www.mdpi.com/2073-4441/13/1/72computational fluid dynamicsenergy lossflow regimessteep open channelstep-pool geometry |
| spellingShingle | Suresh Kumar Thappeta S. Murty Bhallamudi Venu Chandra Peter Fiener Abul Basar M. Baki Energy Loss in Steep Open Channels with Step-Pools Water computational fluid dynamics energy loss flow regimes steep open channel step-pool geometry |
| title | Energy Loss in Steep Open Channels with Step-Pools |
| title_full | Energy Loss in Steep Open Channels with Step-Pools |
| title_fullStr | Energy Loss in Steep Open Channels with Step-Pools |
| title_full_unstemmed | Energy Loss in Steep Open Channels with Step-Pools |
| title_short | Energy Loss in Steep Open Channels with Step-Pools |
| title_sort | energy loss in steep open channels with step pools |
| topic | computational fluid dynamics energy loss flow regimes steep open channel step-pool geometry |
| url | https://www.mdpi.com/2073-4441/13/1/72 |
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