Hydraulic study of two phase flow on low-gradient stepped spillways
Recently, low gradient stepped spillways, which can be constructed on the embankment dams, have been getting high attention owing to their easy implementation. A few numerical researches have been conducted to simulate the flow hydraulic on stepped spillways. In this study, the air water flow was si...
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| Format: | Article |
| Language: | fas |
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Marvdasht Branch, Islamic Azad University
2016-06-01
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| Series: | مهندسی منابع آب |
| Subjects: | |
| Online Access: | https://wej.marvdasht.iau.ir/article_1834_77ecacf34c72152224182777073afbce.pdf |
| _version_ | 1797359766159228928 |
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| author | Ali Akbar Hekmatzadeh Seyed Mehrab Amiri Soroush Papari |
| author_facet | Ali Akbar Hekmatzadeh Seyed Mehrab Amiri Soroush Papari |
| author_sort | Ali Akbar Hekmatzadeh |
| collection | DOAJ |
| description | Recently, low gradient stepped spillways, which can be constructed on the embankment dams, have been getting high attention owing to their easy implementation. A few numerical researches have been conducted to simulate the flow hydraulic on stepped spillways. In this study, the air water flow was simulated using two-phase mixture model. Six models of turbulence including Eddy viscosity, k-ε, RNG k-ε, k-ω, SST k-ω, and ω-RSM were applied to describe the turbulence of flow. According to the results of numerical and experimental tests, it was found that k-w and ω-RSM are superior to describe the turbulence of flow. Moreover, the mixture two-phase model described the experimental data successfully. In addition, the effects of spillway slope, flow discharge, and step height in the amount of energy dissipation were examined. It was concluded that the energy dissipation increases with a rise in the step height and a reduction in the slope and the flow discharge. In the unit discharge of 2.34, the energy dissipation increased from 39 to 50 percent with decreasing the spillway slope from 26.6 to 8.9 degree. |
| first_indexed | 2024-03-08T15:28:32Z |
| format | Article |
| id | doaj.art-6deaafac69a0471fb8b42467c9887bb7 |
| institution | Directory Open Access Journal |
| issn | 2008-6377 2423-7191 |
| language | fas |
| last_indexed | 2024-03-08T15:28:32Z |
| publishDate | 2016-06-01 |
| publisher | Marvdasht Branch, Islamic Azad University |
| record_format | Article |
| series | مهندسی منابع آب |
| spelling | doaj.art-6deaafac69a0471fb8b42467c9887bb72024-01-10T08:07:52ZfasMarvdasht Branch, Islamic Azad Universityمهندسی منابع آب2008-63772423-71912016-06-0192881941834Hydraulic study of two phase flow on low-gradient stepped spillwaysAli Akbar Hekmatzadeh0Seyed Mehrab Amiri1Soroush Papari2استادیار دانشکده عمران و محیط زیست، دانشگاه صنعتی شیرازاستادیار بخش راه و ساختمان و محیط زیست، دانشکده ی مهندسی، دانشگاه شیرازدانشجو کارشناسی ارشد دانشکده عمران و محیط زیست، دانشگاه صنعتی شیرازRecently, low gradient stepped spillways, which can be constructed on the embankment dams, have been getting high attention owing to their easy implementation. A few numerical researches have been conducted to simulate the flow hydraulic on stepped spillways. In this study, the air water flow was simulated using two-phase mixture model. Six models of turbulence including Eddy viscosity, k-ε, RNG k-ε, k-ω, SST k-ω, and ω-RSM were applied to describe the turbulence of flow. According to the results of numerical and experimental tests, it was found that k-w and ω-RSM are superior to describe the turbulence of flow. Moreover, the mixture two-phase model described the experimental data successfully. In addition, the effects of spillway slope, flow discharge, and step height in the amount of energy dissipation were examined. It was concluded that the energy dissipation increases with a rise in the step height and a reduction in the slope and the flow discharge. In the unit discharge of 2.34, the energy dissipation increased from 39 to 50 percent with decreasing the spillway slope from 26.6 to 8.9 degree.https://wej.marvdasht.iau.ir/article_1834_77ecacf34c72152224182777073afbce.pdflow gradient stepped spillwaytwo-phase flowturbulence modelingreynolds stress model |
| spellingShingle | Ali Akbar Hekmatzadeh Seyed Mehrab Amiri Soroush Papari Hydraulic study of two phase flow on low-gradient stepped spillways مهندسی منابع آب low gradient stepped spillway two-phase flow turbulence modeling reynolds stress model |
| title | Hydraulic study of two phase flow on low-gradient stepped spillways |
| title_full | Hydraulic study of two phase flow on low-gradient stepped spillways |
| title_fullStr | Hydraulic study of two phase flow on low-gradient stepped spillways |
| title_full_unstemmed | Hydraulic study of two phase flow on low-gradient stepped spillways |
| title_short | Hydraulic study of two phase flow on low-gradient stepped spillways |
| title_sort | hydraulic study of two phase flow on low gradient stepped spillways |
| topic | low gradient stepped spillway two-phase flow turbulence modeling reynolds stress model |
| url | https://wej.marvdasht.iau.ir/article_1834_77ecacf34c72152224182777073afbce.pdf |
| work_keys_str_mv | AT aliakbarhekmatzadeh hydraulicstudyoftwophaseflowonlowgradientsteppedspillways AT seyedmehrabamiri hydraulicstudyoftwophaseflowonlowgradientsteppedspillways AT soroushpapari hydraulicstudyoftwophaseflowonlowgradientsteppedspillways |