Numerical Simulation of Local Scour of Tandem Four Piers Based on Rhino and Flow-3D Coupling
Aiming at the local scour problem of four-row piers in series under complex terrain,the No.6 Bridge For-mation of Beijing-Hong Kong-Macao high-speed bridge on the Ming River was taken as the research object.The non-uni-form sandy riverbed and incoming sand conditions were characterized by different sediment gradations and median particle sizes.Considering the influencing factors such as the underwater repose angle of sediment,three-dimensional numerical simulation research was carried out through the modeling software Rhino coupled Flow-3D.The flow field structure a-round the four-row piers in series and the evolution process of the scour pit were simulated.Comparing the simulated flow velocity value and scour depth value with the physical test results,the relative error is within 10%,indicating that the constructed mathematical model can better realize the numerical simulation of local scour of four rows of piers in heteroge-neous riverbed under complex terrain.The simulation method can provide reference for similar three-dimensional surface numerical simulation research,which has important reference value for identifying the flow structure and scour character-istics around the pier and guiding the bridge planning and design.
RhinoFlow-3Dfour rows of pierslocal scournumerical simulation
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