Numerical Simulation Of Local Scouring Around Bridge Piers Based On FLUENT

In this paper,it is research that the numerical simulation of the scour of the Cylinder pierIn order to study the scour of Cylinder pier,it is necessary to simulate the complex flow field around the cylinder.The use of CFD software FLUENT to simulate stable flow around the fixed cylinder flow can be obtained near the pier flow distribution,flow form,flow characteristic,velocity distribution,velocity vector diagram,the shear stress distribution of water flow to the pier surface and other information,To provide a reference for the next stage of the laboratory physical model.In this paper,it is based on Yixian wanfotang linghe bridge single cylindrical pier of Daling River pier as the prototype to simulation simulate of pier scour used FLUENT software,mainly carried out the following work:(1)In the fixed bed scour conditions,using VOF method to simulate the unidirectional water flow,and the simulation of gas-liquid two-phase laminar flow around cylinder pier flow distribution,flow characteristics,flow form,velocity distribution,and compare with the experimental results,discussion the influence of water flow on the pier scour.(2)In the movable bed scouring conditions,laying the 10cm sand model in the experimental trough to simulation riversand,through the conversion of sand in the numerical model the thickness of 25cm,with the standard k-? turbulence model and wall function method of the 3D numerical simulation for flow field of Eulerian two-phase coupled water and sand around the pier.To get shear stress distribution on the complex flow field around the pier,and the calculated results are compared with experimental values.(3)Numerical simulation of scour of pier under different flow velocity in the condition of moving bed.