Experimental study of self-formed conversion in channels in threshold motion
محل انتشار: دهمین سمینار بین المللی مهندسی رودخانه
سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 483
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شناسه ملی سند علمی:
IREC10_143
تاریخ نمایه سازی: 8 آذر 1396
چکیده مقاله:
The purpose of this study is to find forms of a transition in threshold motion. To achieve this goal, a trapezoidal channel was built in the laboratory, so that a contraction transition becomes established. Materials of bed and banks are made of uniform sand with median diameter 1.2 mm. Critical shear stress was calculated, considering the properties of materials used in the bed and banks of the channel and then the threshold discharge was calculated. Water flows through this channel for long enough to produce a graceful type. The results showed that the created transition is similar to a semi-parabolic and hyperbolic transition. The difference between the developed transition and a semi-parabolic one is the least.
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نویسندگان
Ahmad Tahershamsi
Associate Professor. Faculty of Civil and Environment Engineering, Amirkabir University of Technology, Tehran, Iran,
Masoume Nikfar
Master of science. Faculty of Civil and Environment Engineering, Amirkabir University of Technology, Tehran, Iran.