On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements
The main goal of the present study is to investigate the effects of macro-roughnesses downstream of the inclined drop through numerical models. Due to the vital importance of geometrical properties of the macro-roughnesses in the hydraulic performance and efficient energy dissipation downstream of i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2024-03-01
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| Series: | Aqua |
| Subjects: | |
| Online Access: | http://aqua.iwaponline.com/content/73/3/553 |
| _version_ | 1797205450329948160 |
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| author | Farhoud Kalateh Ehsan Aminvash Rasoul Daneshfaraz |
| author_facet | Farhoud Kalateh Ehsan Aminvash Rasoul Daneshfaraz |
| author_sort | Farhoud Kalateh |
| collection | DOAJ |
| description | The main goal of the present study is to investigate the effects of macro-roughnesses downstream of the inclined drop through numerical models. Due to the vital importance of geometrical properties of the macro-roughnesses in the hydraulic performance and efficient energy dissipation downstream of inclined drops, two different geometries of macro-roughnesses, i.e., semi-circular and triangular geometries, have been investigated using the Flow-3D model. Numerical simulation showed that with the flow rate increase and relative critical depth, the flow energy consumption has decreased. Also, relative energy dissipation increases with the increase in height and slope angle, so that this amount of increase in energy loss compared to the smooth bed in semi-circular and triangular elements is 86.39 and 76.80%, respectively, in the inclined drop with a height of 15 cm, and 86.99 and 65.78% in the drop with a height of 20 cm. The Froude number downstream on the uneven bed has been dramatically reduced, so this amount of reduction has been approximately 47 and 54% compared to the control condition. The relative depth of the downstream has also increased due to the turbulence of the flow on the uneven bed with the increase in the flow rate.
HIGHLIGHTS
The use of macro-roughness elements downstream of the inclined drop for the first time.;
Using two geometries for macro-roughness elements.;
Examining the influence of the inclined drop angle and also the different states of the macro-roughness elements.; |
| first_indexed | 2024-04-24T08:51:19Z |
| format | Article |
| id | doaj.art-b1eb6221e5c74a03ad5658f848f3ed45 |
| institution | Directory Open Access Journal |
| issn | 2709-8028 2709-8036 |
| language | English |
| last_indexed | 2024-04-24T08:51:19Z |
| publishDate | 2024-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Aqua |
| spelling | doaj.art-b1eb6221e5c74a03ad5658f848f3ed452024-04-16T11:10:02ZengIWA PublishingAqua2709-80282709-80362024-03-0173355356810.2166/aqua.2024.304304On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elementsFarhoud Kalateh0Ehsan Aminvash1Rasoul Daneshfaraz2 Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran Faculty of Engineering, University of Maragheh, Maragheh, Iran The main goal of the present study is to investigate the effects of macro-roughnesses downstream of the inclined drop through numerical models. Due to the vital importance of geometrical properties of the macro-roughnesses in the hydraulic performance and efficient energy dissipation downstream of inclined drops, two different geometries of macro-roughnesses, i.e., semi-circular and triangular geometries, have been investigated using the Flow-3D model. Numerical simulation showed that with the flow rate increase and relative critical depth, the flow energy consumption has decreased. Also, relative energy dissipation increases with the increase in height and slope angle, so that this amount of increase in energy loss compared to the smooth bed in semi-circular and triangular elements is 86.39 and 76.80%, respectively, in the inclined drop with a height of 15 cm, and 86.99 and 65.78% in the drop with a height of 20 cm. The Froude number downstream on the uneven bed has been dramatically reduced, so this amount of reduction has been approximately 47 and 54% compared to the control condition. The relative depth of the downstream has also increased due to the turbulence of the flow on the uneven bed with the increase in the flow rate. HIGHLIGHTS The use of macro-roughness elements downstream of the inclined drop for the first time.; Using two geometries for macro-roughness elements.; Examining the influence of the inclined drop angle and also the different states of the macro-roughness elements.;http://aqua.iwaponline.com/content/73/3/553flow energy dissipationfroude numberinclined dropnumerical simulation |
| spellingShingle | Farhoud Kalateh Ehsan Aminvash Rasoul Daneshfaraz On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements Aqua flow energy dissipation froude number inclined drop numerical simulation |
| title | On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements |
| title_full | On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements |
| title_fullStr | On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements |
| title_full_unstemmed | On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements |
| title_short | On the hydraulic performance of the inclined drops: the effect of downstream macro-roughness elements |
| title_sort | on the hydraulic performance of the inclined drops the effect of downstream macro roughness elements |
| topic | flow energy dissipation froude number inclined drop numerical simulation |
| url | http://aqua.iwaponline.com/content/73/3/553 |
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