Numerical simulation of rapid flow diversion structure

摘要

Three-dimensional diversion structure of open channel is simulated by k - ε two equation model and VOF model, the hydraulic characteristics is obtained including flow pattern, flow field distribution, water surface profile and split ratio and so forth. The flow field of diversion region is strong three-dimensional, the relative turbulence intensity increase as the discharge is increased. When the discharge is kept a high value, the flow is narrowed fiercely in the contract section of main channel. The flow engagement style behind splitter pier correlates closely to downstream water stage. It is conclude that the results of numerical is agree well with the results of experimental measured in terms of water surface profile and split ratio by comparison the numerical findings and experiment results.