Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14365/3020
Title: Experimental and Numerical Investigation of Local Scour Around Square Bridge Pier
Authors: Bor Türkben, Aslı
Güney, Mehmet Şükrü
Keywords: Ansys Fluent
Local scour
Pier scour
Square pier
Unsteady flows
3-Dimensional Flow
Simulation
Scale
Turbulence
Depth
Publisher: Taylors Univ Sdn Bhd
Abstract: This study examines, local scour around square pier under unsteady flow conditions, caused by five different hydrographs. The experiments were conducted in the rectangular flume of 18.6 m length, 0.80 m width and 0.75 m depth, with uniform sediment bed material D-50 = 1.68 mm. Five experiment series were conducted with a plexiglass square pier b = 8.5 cm. The unsteady flow was generated by means of triangular hydrographs. The temporal variations of the equilibrium scour depths in front of the pier and the scour hole dimensions were recorded by two different cameras. The equilibrium scour depths at lateral sides and downstream of the pier were also measured. The hydrograph peak flow rates were found to be much more effective compared to hydrograph durations. The numerical solution was realized by using the software ANSYS FLUENT with RNG k-epsilon turbulence model. The numerical and experimental values were compared and interpreted, and acceptable accordance was observed between them. The calculated lengths and widths of the scour hole were found close to the measured ones. A comparison of the final elevations (t = 15 min.) for experimental and numerical results revealed that; the values of RMSE, MAE errors, and the determination coefficient R-2 were 0.53 cm, 0.48 cm, and 0.94 respectively. The R-2 values are 0.98 and 0.95 for the measured and calculated scour hole length (L) and width (W), respectively.
URI: https://hdl.handle.net/20.500.14365/3020
ISSN: 1823-4690
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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