CONTRACTION EFFECT UPSTREAM ABUTMENTS ON VELOCITY AND SCOUR: EXPERIMENTALAND THEORETICAL STUDY USING IRIC SOFTWARE

Maha R. Fahmy, Mohamed A. Nassar
2017 JES. Journal of Engineering Sciences  
This paper studies scour features and velocity field using experimental and numerical models at rectangular piers under influence of contraction upstream abutments. A bridge model of two vents of 8cm width each is built to conduct experiments. Extra-piles are proposed upstream rectangular abutments. Different relative extensions of piles are tested. In addition, a new abutment of a relative width ranges within 0.0 to 1.25was proposed instead of piles. The flume's dimensions are 40cm width, 20
more » ... re 40cm width, 20 cm deepness and 400cm length. Some design rules are deduced to reduce scour upstream rectangular piers. Cases of locating piles upstream abutments are simulated numerically using SToRM solver in iRIC software. The numerical results indicate that, piles of a relative extension to vent width = 4.812 produce the minimal flow velocity near rectangular piers.
doi:10.21608/jesaun.2017.116082 fatcat:ljprei7lzfa2faicnhy2cw6jjq