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MOHAMMADIUN, S., SALEHI NEYSHABOURI, S.A.A., NASER, GH., PARHIZKAR, H., VAHABI, H.. (1394). EFFECTS OF OPEN-CHANNEL GEOMETRY ON FLOW PATTERN IN A 90° JUNCTION. , 39(C2+), 559-573. doi: 10.22099/ijstc.2015.3520
S. MOHAMMADIUN; S.A.A. SALEHI NEYSHABOURI; GH. NASER; H. PARHIZKAR; H. VAHABI. "EFFECTS OF OPEN-CHANNEL GEOMETRY ON FLOW PATTERN IN A 90° JUNCTION". , 39, C2+, 1394, 559-573. doi: 10.22099/ijstc.2015.3520
MOHAMMADIUN, S., SALEHI NEYSHABOURI, S.A.A., NASER, GH., PARHIZKAR, H., VAHABI, H.. (1394). 'EFFECTS OF OPEN-CHANNEL GEOMETRY ON FLOW PATTERN IN A 90° JUNCTION', , 39(C2+), pp. 559-573. doi: 10.22099/ijstc.2015.3520
MOHAMMADIUN, S., SALEHI NEYSHABOURI, S.A.A., NASER, GH., PARHIZKAR, H., VAHABI, H.. EFFECTS OF OPEN-CHANNEL GEOMETRY ON FLOW PATTERN IN A 90° JUNCTION. , 1394; 39(C2+): 559-573. doi: 10.22099/ijstc.2015.3520

EFFECTS OF OPEN-CHANNEL GEOMETRY ON FLOW PATTERN IN A 90° JUNCTION

Iranian Journal of Science and Technology Transactions of Civil Engineering
شناسنامه علمی شماره، دوره 39، C2+، اسفند 2015، صفحه 559-573    اصل مقاله (1.11 M)
شناسه دیجیتال (DOI): 10.22099/ijstc.2015.3520
نویسندگان
S. MOHAMMADIUN1؛ S.A.A. SALEHI NEYSHABOURI* 2؛ GH. NASER3؛ H. PARHIZKAR4؛ H. VAHABI5
1Hydraulic Structural Eng., Faculty of Civil and Environmental Eng., Tarbiat Modares University, I. R. of Iran
2Faculty of Civil and Environmental Eng. and Water Eng. Research Center, Tarbiat Modares University, I. R. of Iran
3School of Eng. Faculty, University of British Columbia, Canada
4Aerospace Eng., Amirkabir University of Technology, I. R. of Iran
5Mechanical Eng., University of Tehran, I. R. of Iran
چکیده
Open-channel junctions have a broad application in civil and environmental engineering. Formation of a low-pressure zone with recirculating flow (high sedimentation) accompanied by a high-velocity zone (high erosion) is the most characteristic feature of flow in junctions. A large number of researches have been performed to study the complexity of the flow in junctions in open-channel flows. In this research, four new geometrical modifications, based on streamlinization concept, are investigated to understand their effects on reducing the sedimentation and erosion potential in a 90° open-channel junction. First, the numerical model was validated based on previous experimental studies. Then, effects of the mentioned modifications were evaluated and some efficiency measures were devised to improve their performance. The results show that employing the proposed geometrical modifications improves the flow pattern significantly via eliminating the recirculation zone and reducing the maximum flow velocity after the junction. Thereby a comprehensive reduction in sedimentation and erosion potential is produced as well as contracting the stagnation zone.
کلیدواژه‌ها
Open-channel junction؛ geometrical modification؛ numerical model؛ sedimentation؛ Erosion
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