Numerical simulation of flow pattern around spur dikes series in rigid bed

Spur dikes are used to protect river banks from erosion and also keep the main channel navigable. These structures are built from the river bank into the stream flow and usually they are built in group. A spur dike may be submerged during the flood conditions or to be exposed during the low flow. Spur dikes may be classified into two types: impermeable and permeable. Present paper illustrates results of numerical study on flow field around a series impermeable and non-submerged spur dikes with the vertical attitude to the flow axes. In this study the CFD program namely FLOW-3D has been used to simulate the flow field around the spur dikes. In additions, several turbulence models have been applied in order to achieve the best numerical simulation. Finally longitudinal, transverse and vertical component of flow velocity, velocity vectors and streamlines caused by numerical simulation were compared to experimental results. Achieved results can prove that Flow pattern simulation around the spur dikes could be done by FLOW-3D numerical modeling, very well.

Keywords:

Numerical simulation , flow pattern , spur dikes , turbulence model , FLOW-3D