Application of ANSYS-Fluent Software for Innovative Stepped Dissipation Blocks Arrangement in Ogee Spillway

The Ogee Spillway is one of the most crucial flood control structures, and it developed at same time as dams. Spillway's downstream portions experience scouring due to flow, a problem that persists in reality. This paper aims investigate hydraulic performance stepped block dissipater using three-dimensional simulation model. dissipated was given new distribution may be one, two, or three rows transverse arrangement right angle with path lines. numerical simulations for flow scour were performed computational fluid dynamics (CFD) ANSYS-Fluent software. Under Froude numbers ranging from 2.75 9.25, sequence depth velocity measured. According results, employed blocks minimized rates sediment throughout stilling basin line suggested distributions, particularly Fr 4.5-9.25 range. With values 0.95-0.98 range Correlation Coefficient (R 2 ) 0.43-0.45 Root Mean Square Error (RMSE) coefficient comparison experimental data looked good agreement. results proved configuration (A1, A2, A3) where A3 appeared reducing velocities within following A1 A2 especially 4.5-8.5. Also, stability jump observed when A3, while this difficult achieve by both A2.