Simulation Analyses of Flow in the Wake Region of Non-uniform Bridge Pier by using Computational Fluid Dynamic

Authors : Sulaiman Dawood JASIM, Adnan A ISMAEL, Manahil At AL DABBAGH

Pages : 25-31

View : 24 | Download : 6

Publication Date : 2019-07-25

Article Type : Research Paper

Abstract :The study presents a three-dimensional numerical simulation of turbulent flow field around no uniform bridge piers which they are downstream-facing round- nosed insert ignore into journalissuearticles values(DS-FRNP); and upstream-facing round- nosed insert ignore into journalissuearticles values(US-FRNP);, were compared with a circular pier in fixed-bed using the computational fluid dynamics insert ignore into journalissuearticles values(CFD);. In this paper, the flow field passing around the bridge piers is predicted using k- ω standard turbulence model. The predicted flow velocity in x-direction and turbulent kinetic energy insert ignore into journalissuearticles values(TKE); compares with tested data. Simulated flow velocity and turbulent kinetic energy are in good agreement with experimental data. Numerical model predicts the flow features such as flow reversal upstream the pier, down flow upstream the pier and flow in wake region, the shape of vortices insert ignore into journalissuearticles values(horse shoe vortex and wake vortex); also captured by simulation. The discussion of the relation between bridge pier shape and turbulent kinetic energy in this study will help to control the scour around bridge piers.
Keywords : CFD, k ω model, 3D turbulence flow and uncoventional bridge pier