Scour and flow field around a spur dike in a 90° bend

Fazli, Majid; Ghodsian, Masoud; Neyshabouri, Seyed Ali Akbar Salehi

doi:10.1016/s1001-6279(08)60005-0

Cited by 59 publications

(28 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a limit to the amount of fine grains that can be transported (Fazli et al, 2008;Wang et al, 2008;Ghodsian and Vaghefi, 2009;Yu et al, 2009). Thus, the erosion relation is (Cheng et al, 2000):…”

Section: Erosion Relationmentioning

confidence: 99%

A study on water film in saturated sand

Cui

2010

International Journal of Sediment Research

View full text Add to dashboard Cite

Water film can serve as a sliding surface and cause landslides on gentle slopes. The development of "water film" in saturated sand is analyzed numerically and theoretically based on a quasi-three-phase model. It is shown that stable water films initiate and grow if the choking state (where the fluid velocity decreases to near zero) remains steady in a liquefied sand column. Discontinuity can occur in pore water velocity, grain velocity and pore pressure after the initiation of a water film. However, the discontinuity and water film can disappear once the choking state is changed. The key to the formation of water film is the choking in the sand column caused by eroded fine grains.

show abstract

Section: Erosion Relationmentioning

confidence: 99%

A study on water film in saturated sand

Cui

2010

International Journal of Sediment Research

View full text Add to dashboard Cite

show abstract

“…They analysed average flow and studied its relation with the way scour hole is created and expands [2]. Fazli et al in 2008, did an experimental study on a 90 degree bend channel to study the parameters affecting scour around short and straight spur dikes. The results of the study on bend channel with single spur dike indicates that in developed bends, as the spur dike is moved away from the beginning of the bend, maximum depth of scour rises, whereas this parameter in a steep bend first decreases and then increases [3].…”

Section: Introductionmentioning

confidence: 99%

“…Fazli et al in 2008, did an experimental study on a 90 degree bend channel to study the parameters affecting scour around short and straight spur dikes. The results of the study on bend channel with single spur dike indicates that in developed bends, as the spur dike is moved away from the beginning of the bend, maximum depth of scour rises, whereas this parameter in a steep bend first decreases and then increases [3]. Ghodsian and Vaghefi in 2009, conducted an experimental study on how changes in Froude Number, and length of wing and web of T-shaped spur dike located in a 75 degree position affect flow pattern in a 90 degree bend.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on 3D Flow around a Single T-Shaped Spur Dike in a Bend

Vaghefi

Ghodsian

Akbari

2017

Period. Polytech. Civil Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The results did not seem to be accurate since the turbulence model employed in this case was not reliable enough. Fazli, Ghodsian, and Neyshabouri (2008) conducted an experimental study on a 90° bend to investigate the effective parameters of scour around short straight spur dikes. The results illustrated that in a developed bend, the maximum scour depth is estimated to increase as a result of moving spur dike away from the start of the bend.…”

Section: Introductionmentioning

confidence: 99%

The effect of submergence ratio on flow pattern around short T-head spur dike in a mild bend with rigid bed using numerical model

Vaghefi

Alavinezhad

Akbari

2016

Journal of the Chinese Institute of Engineers

View full text Add to dashboard Cite

Spur dikes are hydraulic structures frequently applied to protect rivers' banks. Since flow pattern around a spur dike located in a rivers' bend is particularly complicated due to the existence of secondary flow and helical flow, the effect of submergence ratio on flow patterns around a short T-head spur dike located in a 90° bend has been monitored numerically in this study. The numerical data are verified with experimental data obtained under non-submerged conditions, which indicate the numerical results are in accordance with experimental data. In this research, the numerical simulation based on various submergence ratios is done using FLOW-3D software to analyze. The results showed an increase in dimensions and the number of vortices associated with an increase in submergence ratio so that for the amount of 50% submergence, two vortices form around outer wall and an area downstream of the wing of spur dike, at bed level. Moreover, the length and width of separation zones were estimated to be 1.6 and 1.5 times larger compared to nonsubmerged condition, respectively.

show abstract

Scour and flow field around a spur dike in a 90° bend

Cited by 59 publications

References 8 publications

A study on water film in saturated sand

A study on water film in saturated sand

Experimental Investigation on 3D Flow around a Single T-Shaped Spur Dike in a Bend

The effect of submergence ratio on flow pattern around short T-head spur dike in a mild bend with rigid bed using numerical model

Contact Info

Product

Resources

About