Numerical simulation of the flow under sluice gates by SPH model

Sluice gates are widely used for ow control in open channels. Flow under a gate is complicated with a rapidly varying free surface and dynamic pressure distribution. Due to this complexity, most of the studies to date are based on physical models. In the present study the ow under sluice gates on a at bed is modeled numerically. Owing to the capabilities of SPH model, in simulating rapidly varied free surface ows, this Lagrangian method was applied in the present study. The SPH model was further developed by introducing IXSPH and an innovative method was proposed to simulate the constant in ow discharge. The present model results for free surface prole, as well as velocity and pressure eld indicated good agreement with experimental and existing Eulerian numerical results. In the present work, the contraction and discharge coecients were also captured for dierent opening ratios and gate inclinations. This study shows the ability of the developed SPH model as a useful tool in designing hydraulic structures.