Velocity profiles and turbulence intensities around side-by-side bridge piers under ice-covered flow condition

Title:

Velocity profiles and turbulence intensities around side-by-side bridge piers under ice-covered flow condition

Creator:

Namaee, Mohammad Reza and Sui, Jueyi

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:fa68d60f-299b-43af-b1f1-8ffbe194716f
uuid:fa68d60f-299b-43af-b1f1-8ffbe194716f
doi:10.2478/johh-2019-0029

Subject:

bridge pier, ice cover, local scour, acoustic Doppler velocimetry (ADV), and horseshoe vortex

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Recent studies have shown that the presence of ice cover leads to an intensified local scour pattern in the vicinity of bridge piers. To investigate the local scour pattern in the vicinity of bridge pier under ice-covered flow condition comparing to that under open channel flow condition, it is essential to examine flow field around bridge piers under different flow conditions. In order to do so, after creation of smooth and rough ice covers, three-dimensional timeaveraged velocity components around four pairs of bridge piers were measured using an Acoustic Doppler velocimetry (ADV). The ADV measured velocity profiles describe the difference between the velocity distributions in the vicinity of bridge piers under different covered conditions. Experimental results show that the vertical velocity distribution which represents the strength of downfall velocity is the greatest under rough covered condition which leads to a greater scour depth. Besides, results show that the turbulent intensity increases with pier size regardless of flow cover, which implies that larger scour depth occurs around piers with larger diameter.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

70-82

Source:

Journal of hydrology and hydromechanics | 2020 Volume:68 | Number:1

Harvested from:

CDK

Metadata only:

false