Author(s): Yan Tian; Genguang Zhang; Zipeng Qin
Linked Author(s):
Keywords: 3D numerical modeling; Spiral flow; Flow field
Abstract: Sand trapping tube is usually used in head work of water diversion project with the low cost and high efficiency to remove bed sediment. Based on the closed Reynolds equation with turbulence model, volume of fluid (VOF) method is adopted to track the free surface and the finite volume method is used to discretize the equations, the flow field in sand trapping tube is obtained by the commercial CFD code FLUENT. A series of numerical simulations that reproduce particular published laboratory flows are presented. Rather complete flow field information, for example, tangential flow velocity, axial velocity and radial velocity distribution in sand trapping tube are obtained. In order to identify the importance of various controlling parameters to flow field, such as water depth, open width and diameter of sand trapping tube, the sand trapping tube and channel axis angle, sand trapping tube opening length, sand trapping tube longitudinal slope are analyzed in detail. It provides a certain basis for study of bed load transport mechanism and design of sand trapping tube with spiral flow in open channel.
Year: 2013