Scour at the head of a vertical-wall breakwater

Publication: Research - peer-reviewJournal article – Annual report year: 1997

Standard

Scour at the head of a vertical-wall breakwater. / Sumer, B. Mutlu; Fredsøe, Jørgen.

In: Coastal Engineering, Vol. 29, No. 3-4, 1997, p. 201-230.

Publication: Research - peer-reviewJournal article – Annual report year: 1997

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Author

Sumer, B. Mutlu; Fredsøe, Jørgen / Scour at the head of a vertical-wall breakwater.

In: Coastal Engineering, Vol. 29, No. 3-4, 1997, p. 201-230.

Publication: Research - peer-reviewJournal article – Annual report year: 1997

Bibtex

@article{a8a275abcefe42d2bc2b49de0999ff7b,
title = "Scour at the head of a vertical-wall breakwater",
publisher = "Elsevier BV",
author = "Sumer, {B. Mutlu} and Jørgen Fredsøe",
year = "1997",
doi = "10.1016/S0378-3839(96)00024-5",
volume = "29",
number = "3-4",
pages = "201--230",
journal = "Coastal Engineering",
issn = "0378-3839",

}

RIS

TY - JOUR

T1 - Scour at the head of a vertical-wall breakwater

A1 - Sumer,B. Mutlu

A1 - Fredsøe,Jørgen

AU - Sumer,B. Mutlu

AU - Fredsøe,Jørgen

PB - Elsevier BV

PY - 1997

Y1 - 1997

N2 - This paper presents the results of an experimental investigation on the near-bed flow patterns, the bed shear stress amplification and scour around the head of a vertical-wall breakwater, using regular waves. The Keulegan-Carpenter number (KC), based on the diameter of the breakwater head, is found to be the major parameter that governs the flow and the equilibrium scour depth. Basic flow structures are identified as function of KC. The scour depth is found to increase with increasing the Keulegan-Carpenter number. The necessary extent of the conventional stone protection is studied. An empirical formula is worked out for the width of the protection layer as function of KC. Also, the effects of head shape, the angle of attack and the presence of a co-directional current are investigated. The results indicate that the scour depth is increased considerably in the presence of a current. Likewise, the scour depth is increased when the head shape is changed from a round shape to a sharp-edged one. It is found that the angle of attack is also an influencing factor as regards the scour depth.

AB - This paper presents the results of an experimental investigation on the near-bed flow patterns, the bed shear stress amplification and scour around the head of a vertical-wall breakwater, using regular waves. The Keulegan-Carpenter number (KC), based on the diameter of the breakwater head, is found to be the major parameter that governs the flow and the equilibrium scour depth. Basic flow structures are identified as function of KC. The scour depth is found to increase with increasing the Keulegan-Carpenter number. The necessary extent of the conventional stone protection is studied. An empirical formula is worked out for the width of the protection layer as function of KC. Also, the effects of head shape, the angle of attack and the presence of a co-directional current are investigated. The results indicate that the scour depth is increased considerably in the presence of a current. Likewise, the scour depth is increased when the head shape is changed from a round shape to a sharp-edged one. It is found that the angle of attack is also an influencing factor as regards the scour depth.

U2 - 10.1016/S0378-3839(96)00024-5

DO - 10.1016/S0378-3839(96)00024-5

JO - Coastal Engineering

JF - Coastal Engineering

SN - 0378-3839

IS - 3-4

VL - 29

SP - 201

EP - 230

ER -