2014
DOI: 10.1007/s10652-013-9332-1
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Three-dimensional analysis of coherent turbulent flow structure around a single circular bridge pier

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Cited by 67 publications
(50 citation statements)
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“…This is an especially compelling argument, given that these features would seem at least to have the same general shape and placement. Indeed, a strong association has been found between either one or several nested horseshoe vortices and the area of scour that surrounds the base of bridge piers in flowing water [e.g., Dargahi , ; Keshavarzi et al , ; Tsutsui , ]. However, the zone immediately upwind of the cylinder in the present study is marked by significant stagnation of the streamwise component of the flow (also low turbulence intensity), which expands and intensifies across an increasing area of the front wall of the roughness element as the bed surface attains a stable topography.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…This is an especially compelling argument, given that these features would seem at least to have the same general shape and placement. Indeed, a strong association has been found between either one or several nested horseshoe vortices and the area of scour that surrounds the base of bridge piers in flowing water [e.g., Dargahi , ; Keshavarzi et al , ; Tsutsui , ]. However, the zone immediately upwind of the cylinder in the present study is marked by significant stagnation of the streamwise component of the flow (also low turbulence intensity), which expands and intensifies across an increasing area of the front wall of the roughness element as the bed surface attains a stable topography.…”
Section: Discussionmentioning
confidence: 99%
“…In comparison, the flow structure in the vicinity of a wall‐mounted cylinder of finite height [e.g., Eckerle and Awad , ; Pattenden et al , ; Palau‐Salvador et al , ; Sumner et al , ] has been less studied but is recognized as being a particularly complex situation that is relevant to a wide range of applications in engineering and environmental science, the most popular concerning scour surrounding bridge piers [e.g., Dargahi , ; Keshavarzi et al , ; Tsutsui , ]. End effects are significant for roughness elements of fixed height, with regard to both the free tip and the attached base, giving rise to interacting vortex systems that are three dimensional and highly unsteady.…”
Section: Introduction and Contextmentioning
confidence: 99%
“…Waves in these environments can be erratic and of high frequency, making it difficult for the AUVMS to maintain a steady end-effector pose. Furthermore, water flow patterns vary greatly in direction and magnitude around the circumference of the pile [15]. These may induce large disturbances to the vehicle body.…”
Section: A Problem Scenariomentioning
confidence: 99%
“…Waves at the surface of the water may be frequent and erratic. Furthermore, water flow around piles is turbulent and highly irregular [15]. Due to the time delay in the dynamic response of the vehicle control, we assume that it will be insufficient in nullifying these disturbances completely.…”
Section: Model Predictive Controlmentioning
confidence: 99%
“…In spite of extensive experimental works on local scour around piers, only very few investigations have been made to understand the turbulent characteristics of flow and the associated coherent structures within the scour hole (Istiarto 2001;Hopfinger et al 2004;Bey et al 2007;Kirkil et al 2008;Termini and Sammartano 2012;Link et al 2012;Izadinia et al 2013;Maity and Mazumder 2014;Keshavarzi et al 2014). Termini (2005) and Termini and Sammartano (2008) investigated the influence of horizontal turbulence on the bed form creation.…”
Section: Introductionmentioning
confidence: 99%