TY - JOUR ID - 13456 TI - Experimental and Numerical Investigation of the Effect of Transition Length on Energy Losses in Gradual Transitions Open Channels Under Subcritical Flow JO - Irrigation Sciences and Engineering JA - JISE LA - en SN - 2588-5952 AU - Asnaashari, Adel AU - Akhtari, Ali Akbar AU - Dehghani, Amir Ahmad AU - Bonakdari, Hossain AD - Ph.D. Candidate of Civil Engineering, Hydraulic Structures, Razi University, Kermanshah, Iran. AD - Assistant Professor, Department of Civil Engineering, Razi University, Kermanshah, Iran AD - Associate Professor, Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. AD - 4- Professor, Department of Civil Engineering, Razi University, Kermanshah, Iran. Y1 - 2018 PY - 2018 VL - 41 IS - 2 SP - 45 EP - 59 KW - Expansive Gradual Transition KW - flow pattern KW - Energy Losses KW - Flow Separation Zones KW - Bed Shear Stress DO - 10.22055/jise.2018.13456 N2 - 'Transition' is a short hydraulic structure used to change the cross-sectional shape or flow shape. Transitions are commonly used both in the open-channels and natural waterways. The task of a transition is to connect a narrow channel at the upstream to a wider downstream channel or vice-versa. This, creates a disturbance region of turbulent flow causing energy losses. In general, the structure of a transition prevents the formation of wave and other turbulencies. In this case, the energy loss, due to the change in the amount of the momentum, will be minimized. UR - https://jise.scu.ac.ir/article_13456.html L1 - https://jise.scu.ac.ir/article_13456_6a60a7dc54ac29004a28d82c59038273.pdf ER -