Observations of bridge abutment scour lead to a practical new approach for estimating realistic scour IIHR-Hydroscience and Engineering depths at bridge abutments. Prior design approaches usually led to unrealistically deep estimates of abutment scour depth. The observations presented stem from flume experiments conducted with abutments with approach embankments subject to a range of erodibilit...

The main goal of this study was comparing the performance an open-source code OpenFOAM and a commercial software Ansys Fluent in simulating turbulent flow through scour hole developed sand bed channel, which helps to give hint choosing appropriate calculating tool. Both models were set with same mesh as similar possible numerical settings, RANS turbulence modeling, applying k-?SST model, transi...

Most studies on local scouring at grade control structures have principally focused the analysis of primary flow field, predicting equilibrium scour depth. Despite numerous processes, secondary currents were not often considered. Based comprehensive measurements velocities in clear water scours downstream a structure channel with non-cohesive sediments, this study, we attempted to investigate g...

River confluence is a common feature of most irrigation and drainage channels and river systems, where tributary conflicts the main channel. In these section, rapid changes in velocity and discharge, sediment distribution and flow turbulent result in a deep confluence scour, a bar point in the separation zone at downstream of junction corner  and finally vortex flow. Thus, the main goal of this...

The prediction of scour evolution at bridge foundations is utmost importance for engineering design and infrastructures’ safety. complexity the scouring inherent flow field result separation generation multiple vortices further magnified due to dynamic interaction between movable bed throughout development a hole. In experimental environments, current approaches characterization rely mainly on ...

The evolution of bridge pier scour is very important for bridge safety warning and assessment. During typhoon seasons in Taiwan, the torrential river flow often causes scour monitoring instruments to fail in their attempt to measure the temporal variations of pier scour depths. To better understand the scouring phenomenon during a large flood event, this study proposes a fast and reliable metho...