B. Biglari et Tw. Sturm, NUMERICAL MODELING OF FLOW AROUND BRIDGE ABUTMENTS IN COMPOUND CHANNEL, Journal of hydraulic engineering, 124(2), 1998, pp. 156-164
Numerical modeling of flow around bridge abutments located on the floo
dplain of a compound open channel is presented using a two-dimensional
, depth-averaged, k-epsilon turbulence model. The model uses a finite
volume difference scheme with a staggered grid to solve the governing
equations of flow and turbulence transport in elliptic form. The numer
ical model results for velocity and flow depth are compared with labor
atory data for flow in a compound open channel that consists of a main
channel and symmetric floodplains set at a fixed bed slope. Reasonabl
e agreement between the numerical results and experimental data is sho
wn both for the case of steady, uniform flow and for the case of stead
y, nonuniform flow around a bridge abutment located in the floodplain.
The numerical results are applied in a correlation of measured values
of equilibrium clear-water scour depth with numerical values of local
velocity near the upstream corner of the abutment face. This study is
limited to shallow how in a laboratory compound channel with wide, ro
ugh floodplains and vertical wall abutments that end in the floodplain
.