3-D numerical study of local scour around bridge piers

2018 ◽  
Author(s):  
H. Omara ◽  
Sherif M. Elsayed ◽  
G. M. Abdeelaal ◽  
Hany F. Abd-Elhamid ◽  
A. Tawfik
Keyword(s):  
Numerical Study ◽  
Local Scour ◽  
Bridge Piers

Discussion of “Local Scour Around Bridge Piers”

1970 ◽  
Vol 96 (8) ◽  
pp. 1742-1747
Author(s):  
L. Veiga Da Cunha
Keyword(s):  
Local Scour ◽  
Bridge Piers

Discussion of “Local Scour Around Bridge Piers”

1970 ◽  
Vol 96 (5) ◽  
pp. 1224-1227
Author(s):  
Charles R. Neill
Keyword(s):  
Local Scour ◽  
Bridge Piers

scholarly journals Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction

2018 ◽  
Vol 13 (2) ◽  
pp. 110-120 ◽  
Author(s):  
Ibtesam Abudallah Habib ◽  
Wan Hanna Melini Wan Mohtar ◽  
Atef Elsaiad ◽  
Ahmed El-Shafie
Keyword(s):  
Froude Number ◽  
Local Scour ◽  
Bridge Piers ◽  
Scour Depth ◽  
Skew Angle ◽  
Flow Angle ◽  
Sediment Size ◽  
Low Froude Number ◽  
Skew Angles ◽  
Depth Reduction

This study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varied at four angles, i.e., skew angles, i.e., 0°, 10°, 20° and 30°. Scour reduction was clear when decreasing nose angles and reached maximum when the nose angle is 45°. Increasing the flow velocity and skew angle was subsequently increasing the scour profile, both in vertical and transversal directions. However, the efficiency of nose angle piers was only high at low Froude number less than 0.40 where higher Froude number gives minimal changes in the maximum scour depth reduction. At a higher skew angle, although showed promising maximum scour depth reduction, the increasing pier projected width resulted in the increase of transversal lengths.

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