recently, particular attention has been paid to the stepped spillways due to the increasing effect of energy dissipation and the reduction of cavitations risks with the development of roller compacted concrete (rcc) technique. flow regimes on the spillways divide into three groups, namely skimming, jet and transition flow. compared to the numerical methods, the majority of performed studies in ...

Spillway design is key to the effective and safe operation of dams. Typically, flow characterized by high velocity, levels turbulence, aeration. In last two decades, advances in computational fluid dynamics (CFD) made available several numerical tools aid hydraulic structures engineers. The most frequent approach solve Reynolds-averaged Navier–Stokes equations using an Euler type model combined...

the security and stability of dams for flood passing through the spillway should be provided. so, kinetic energy of flow over large spillway must be dissipated. one of the energy dissipation structures at downstream dams, are plunging pools. the aim of this paper is to investigate dynamic pressure that is created by the impact of a series of rounded non-submerged jets on a flat plate with the r...

The discharge coefficient of an ogee crest is a function the ratio effective head to design head. purpose present study derive theoretical model this relation, which does not depend on empirical coefficients and whose predictions over wide range ratios are accurate enough for practical use. developments consider unsubmerged crests without approach flow or lateral contraction effects, heads larg...