Numerical Simulation of the effect of simple and T-shaped dikes on turbulent flow field and sediment scour/deposition around diversion intakes


Sepehr Mortazavi Farsani,Najaf Hedayat,Nelia sadeghi Khoveigani,



T-shaped dikes,turbulent flow field,sediment scour,diversion intakes,


The interaction of flow patterns with the movements of live bed of natural channels is a complex 3D process which requires precise investigation in different scenarios to be fully understood. This study effort to investigate the flow patterns and its effect on the formation of scour holes and deposition stacks in the vicinity of a diversion channel entrance considering the presence of a single dike with various lengths normal to flow and different simple and T-shaped models. Results indicated that Dike shape and its length normal to flow significantly affects the ratio of diverted discharge, volume of sediment transport into the diversion channel, and volume and depth of the scour holes as well as the shape, height and location of the formation of the deposition stack. Increasing the length of wing for the T-shaped dikes could decrease the depth and span of the scour holes efficiently as well reducing the dimensions of deposition stack to form out of the diversion channel.


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