Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel
One of the important purposes of river engineering science is to protect river banks from erosion phenomenon and to prevent shifting of the main channel path. Spur dike is a hydraulic structure which has a lot of applications for stabilizing river banks and increasing water depth. According to wides...
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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_1833_f02c9ca8c83e22384e0614db411f69cb.pdf |
| _version_ | 1797359751994015744 |
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| author | Mohammad Vaghefi Afshin Eghbalzadeh Mokhtar Rostamnezhad |
| author_facet | Mohammad Vaghefi Afshin Eghbalzadeh Mokhtar Rostamnezhad |
| author_sort | Mohammad Vaghefi |
| collection | DOAJ |
| description | One of the important purposes of river engineering science is to protect river banks from erosion phenomenon and to prevent shifting of the main channel path. Spur dike is a hydraulic structure which has a lot of applications for stabilizing river banks and increasing water depth. According to widespread use of this structure, it is important to understand the flow pattern around it. Since flow pattern around a spur dike is complex and fully 3D, 3D simulation was done in this study. FLOW-3D software was employed to simulate the flow around a submerged spur dike. VOF method was used for free surface simulation and RNG k-ε model was used for turbulence modeling. Based on comparison of numerical and experimental results for stream wise velocity component and flow depth, it was concluded that numerical model could simulate the flow parameters with relatively high accuracy. In following, the effect of discharge increase on velocity profiles and flow free surface was investigated. According to obtained results, maximum longitudinal velocity Infront of the spur dike nose and flow depth at the upstream of spur dike increased with discharge increase. In lower discharges, the changes rate was more and vice versa. Also, the ratio of the flow depth at the upstream and the flow depth at the downstream increased with discharge increase. |
| first_indexed | 2024-03-08T15:28:19Z |
| format | Article |
| id | doaj.art-398428a578a5447eb06d830bd25fdadf |
| institution | Directory Open Access Journal |
| issn | 2008-6377 2423-7191 |
| language | fas |
| last_indexed | 2024-03-08T15:28:19Z |
| publishDate | 2016-06-01 |
| publisher | Marvdasht Branch, Islamic Azad University |
| record_format | Article |
| series | مهندسی منابع آب |
| spelling | doaj.art-398428a578a5447eb06d830bd25fdadf2024-01-10T08:07:52ZfasMarvdasht Branch, Islamic Azad Universityمهندسی منابع آب2008-63772423-71912016-06-0192867801833Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channelMohammad Vaghefi0Afshin Eghbalzadeh1Mokhtar Rostamnezhad2استادیار سازه‌های هیدرولیکی، گروه مهندسی عمران، دانشگاه خلیج فارس، بوشهراستادیار سازه‌های هیدرولیکی، گروه مهندسی عمران، پژوهشکده تحقیقات پیشرفته آب و فاضلاب، دانشگاه رازی کرمانشاهدانش آموخته کارشناسی ارشد، گروه مهندسی عمران، دانشگاه آزاد اسلامی بوشهرOne of the important purposes of river engineering science is to protect river banks from erosion phenomenon and to prevent shifting of the main channel path. Spur dike is a hydraulic structure which has a lot of applications for stabilizing river banks and increasing water depth. According to widespread use of this structure, it is important to understand the flow pattern around it. Since flow pattern around a spur dike is complex and fully 3D, 3D simulation was done in this study. FLOW-3D software was employed to simulate the flow around a submerged spur dike. VOF method was used for free surface simulation and RNG k-ε model was used for turbulence modeling. Based on comparison of numerical and experimental results for stream wise velocity component and flow depth, it was concluded that numerical model could simulate the flow parameters with relatively high accuracy. In following, the effect of discharge increase on velocity profiles and flow free surface was investigated. According to obtained results, maximum longitudinal velocity Infront of the spur dike nose and flow depth at the upstream of spur dike increased with discharge increase. In lower discharges, the changes rate was more and vice versa. Also, the ratio of the flow depth at the upstream and the flow depth at the downstream increased with discharge increase.https://wej.marvdasht.iau.ir/article_1833_f02c9ca8c83e22384e0614db411f69cb.pdfsubmerged spur dikefree surfacenumerical simulationflow-3d |
| spellingShingle | Mohammad Vaghefi Afshin Eghbalzadeh Mokhtar Rostamnezhad Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel مهندسی منابع آب submerged spur dike free surface numerical simulation flow-3d |
| title | Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| title_full | Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| title_fullStr | Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| title_full_unstemmed | Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| title_short | Numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| title_sort | numerical study of the effect of discharge on flow pattern around a submerged spur dike in an open channel |
| topic | submerged spur dike free surface numerical simulation flow-3d |
| url | https://wej.marvdasht.iau.ir/article_1833_f02c9ca8c83e22384e0614db411f69cb.pdf |
| work_keys_str_mv | AT mohammadvaghefi numericalstudyoftheeffectofdischargeonflowpatternaroundasubmergedspurdikeinanopenchannel AT afshineghbalzadeh numericalstudyoftheeffectofdischargeonflowpatternaroundasubmergedspurdikeinanopenchannel AT mokhtarrostamnezhad numericalstudyoftheeffectofdischargeonflowpatternaroundasubmergedspurdikeinanopenchannel |