Flow Near Groynes: Experimental or Computational Approaches

The research of Mohamed F.M. Yossef and Huid J. de Vriend published in the Journal of Hydraulic Engineering (2011) presented in detail the dynamics of the flow near groynes. By physical experiment, in a fixed bed flume, the authors found out the differences in nature of turbulence between submerged and emerged groyne stage. They provided insight into the flow pattern in vicinity of groynes, the shape and extent of the mixing layer at different flow stages, and the dynamic behavior of velocity along the mixing layer the main channel and the groyne fields. With the aim of modeling with a numerical tool the observed results, this paper presents the work developed with the TELEMAC-3D modeling system and the hypothesis used by Yossef and De Vriend. The simulated results are quite similar with the experiment in many aspects. The performance of the simulation demonstrates the strong capacity of computational modeling systems like TELEMAC-3D in representing the flow stage in different cases. The result also confirms preeminence of computational program about flexibility, simulated time and result expression in comparison with experiment. The paper is expected to provide an insight view about using computational model for hydraulic research and to be useful for studying the dynamics of flow near groynes by hydrodynamics simulation.