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

Yıl 2019, Cilt: 6 , 25 - 31, 25.07.2019

Sulaiman Dawood Jasım Adnan A. Ismael Manahil A.t. Al Dabbagh

Öz

The study presents a three-dimensional numerical simulation of turbulent
flow field around no uniform bridge piers which they are downstream-facing
round- nosed (DS-FRNP) and upstream-facing round- nosed (US-FRNP), were
compared with a circular pier in fixed-bed using the computational fluid
dynamics (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 (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 (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.

Anahtar Kelimeler

CFD, k-ω model, 3D turbulence flow and uncoventional bridge pier

Kaynakça

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