چکیده مقاله
Due to the three dimensional flow pattern interacting with bed material, the process of local scour around bridge piers is complex Many former studies have been carried out to develop relationship for estimation of maximum scour depth under clear and live bed scour in steady flow condition Also some studies focus on numerical modeling of scouring around bridge piers in steady flow condition It must be noted that a few studies available for assessing the scour depth occurring under a flood hydrograph The previous results show that the maximum scour depth occurring under a flood hydrograph can be much smaller than the calculated value using peak flow discharge In this study, the evolution of scour depth has been computed numerically by SSIIM program The main strength of SSIIM compared to other CFD programs is the capability of sediment transport with moveable bed in complex geometry The experimental data of previous researchers were used for calibration and validation of SSIIM model The comparison of results with experimental data shows the capability of numerical simulation for assessing the time dependent scour depth around bridge piers Also the results show that the K ω turbulence model give better results than the other turbulence models for simulation of scouring development
کلیدواژهها
نویسندگان
امیراحمد دهقانی
Department of Water Engineering, Gorgan University of Agricultural Sciences &Natural Resources, Gorgan, Iran
Alireza Nazari
Department of Civil Engineering, Islamic University south Dezfol, Dezfol, Iran
Samaneh Kargar
Department of Water Engineering, University of Tehran, Tehran, Iran
شیوه ارجاع
Dehghani, Amir Ahmad and Nazari, Alireza and Kargar, Samaneh,1388,3D Numerical Simulation of Scour Depth Evolution Around Bridge Piers,08th International River Engineering Conference ,Ahvaz
ارائهشده در
مجموعه مقالات هشتمین سمینار بین المللی مهندسی رودخانه6 بهمن 1388 · اهواز