اخبار و اعلانات

 آمار

تعداد نشریات31
تعداد شماره‌ها834
تعداد مقالات8,015
تعداد مشاهده مقاله14,854,648
تعداد دریافت فایل اصل مقاله9,587,698
Emami, S., Arvanaghi, H., Parsa, J.. (1396). Effect of Weir Height on Flow Features of Duckbill Weir. نشریه علمی دانشگاه سیستان و بلوچستان, 2(3), 45-50. doi: 10.22111/jhe.2018.3847
S. Emami; H. Arvanaghi; J. Parsa. "Effect of Weir Height on Flow Features of Duckbill Weir". نشریه علمی دانشگاه سیستان و بلوچستان, 2, 3, 1396, 45-50. doi: 10.22111/jhe.2018.3847
Emami, S., Arvanaghi, H., Parsa, J.. (1396). 'Effect of Weir Height on Flow Features of Duckbill Weir', نشریه علمی دانشگاه سیستان و بلوچستان, 2(3), pp. 45-50. doi: 10.22111/jhe.2018.3847
Emami, S., Arvanaghi, H., Parsa, J.. Effect of Weir Height on Flow Features of Duckbill Weir. نشریه علمی دانشگاه سیستان و بلوچستان, 1396; 2(3): 45-50. doi: 10.22111/jhe.2018.3847

Effect of Weir Height on Flow Features of Duckbill Weir

Journal of Hydrosciences and Environment
مقاله 7، دوره 2، شماره 3، اردیبهشت 2018، صفحه 45-50    اصل مقاله (899.28 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22111/jhe.2018.3847
نویسندگان
S. Emami* 1؛ H. Arvanaghi2؛ J. Parsa3
1Master of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2Associate professor of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
3Assistant Professor of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
چکیده
Duckbill weirs do not have a straight crest in the direction perpendicular to the flow. The plan view of the weir consists of multiple and broken linear crests that increase its effective length. The advantages of this type of weirs are their higher discharge capacity, easy aeration as well as low fluctuations of water surface at the weir upstream. In this study, discharge coefficient of the duckbill weir is investigated numerically. Numerical modeling is carried out by Fluent v. 6.2. The simulated velocity and pressure field are coupled by using "Piso" method. Reynolds governing equations, turbulence k –ε model, and the Volume of Fluid (VOF) model are numerically solved to define pressure and velocity. Also a few equations are proposed to define the relationship of discharge coefficients with some dimensionless hydraulic Parameters. Results showed that as the height of weir is increased, the discharge coefficient increases and the value of discharge coefficient is constant after H/P = 0.3 and is fixed on 0.47. Also the increase in weir height has a significant effect on the increase in the duckbill weir on discharge coefficient, which is an important factor in designing these weirs. Equation 8, with error value of 0.01695, is presented as the best equation to estimate the discharge coefficient over duckbill weirs.
کلیدواژه‌ها
Duckbill Weir؛ Discharge Coefficient؛ Fluent؛ Height of Weir؛ K –Ε Model
آمار
تعداد مشاهده مقاله: 1,927
تعداد دریافت فایل اصل مقاله: 1,217


سامانه مدیریت نشریات علمی. طراحی و پیاده سازی از سیناوب