Coherent structures in wave boundary layers. Part 2. Solitary motion

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Coherent structures in wave boundary layers. Part 2. Solitary motion. / Sumer, B. Mutlu; Jensen, Palle Martin; Sørensen, Lone B.; Fredsøe, Jørgen; Liu, P.L.-F.; Carstensen, Stefan.

In: Journal of Fluid Mechanics, Vol. 646, 2010, p. 207-231.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Sumer, B. Mutlu; Jensen, Palle Martin; Sørensen, Lone B.; Fredsøe, Jørgen; Liu, P.L.-F.; Carstensen, Stefan / Coherent structures in wave boundary layers. Part 2. Solitary motion.

In: Journal of Fluid Mechanics, Vol. 646, 2010, p. 207-231.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Bibtex

@article{a39e21dd28704c86a3a42de9fac67a9f,
title = "Coherent structures in wave boundary layers. Part 2. Solitary motion",
publisher = "Cambridge University Press",
author = "Sumer, {B. Mutlu} and Jensen, {Palle Martin} and Sørensen, {Lone B.} and Jørgen Fredsøe and P.L.-F. Liu and Stefan Carstensen",
year = "2010",
doi = "10.1017/S0022112009992837",
volume = "646",
pages = "207--231",
journal = "Journal of Fluid Mechanics",
issn = "0022-1120",

}

RIS

TY - JOUR

T1 - Coherent structures in wave boundary layers. Part 2. Solitary motion

A1 - Sumer,B. Mutlu

A1 - Jensen,Palle Martin

A1 - Sørensen,Lone B.

A1 - Fredsøe,Jørgen

A1 - Liu,P.L.-F.

A1 - Carstensen,Stefan

AU - Sumer,B. Mutlu

AU - Jensen,Palle Martin

AU - Sørensen,Lone B.

AU - Fredsøe,Jørgen

AU - Liu,P.L.-F.

AU - Carstensen,Stefan

PB - Cambridge University Press

PY - 2010

Y1 - 2010

N2 - This study continues the investigation of wave boundary layers reported by Carstensen, Sumer & Fredsøe (J. Fluid Mech., 2010, part 1 of this paper). The present paper summarizes the results of an experimental investigation of turbulent solitary wave boundary layers, simulated by solitary motion in an oscillating water tunnel. Two kinds of measurements were made: bed shear stress measurements and velocity measurements. The experiments show that the solitary-motion boundary layer experiences three kinds of flow regimes as the Reynolds number is increased: (i) laminar regime; (ii) laminar regime where the boundary-layer flow experiences a regular array of vortex tubes near the bed over a short period of time during the deceleration stage; and (iii) transitional regime characterized with turbulent spots, revealed by single/multiple, or, sometimes, quite dense spikes in the bed shear stress traces. Supplementary synchronized flow visualization tests confirmed the presence of the previously mentioned flow features. Information related to flow resistance are also given in the paper.

AB - This study continues the investigation of wave boundary layers reported by Carstensen, Sumer & Fredsøe (J. Fluid Mech., 2010, part 1 of this paper). The present paper summarizes the results of an experimental investigation of turbulent solitary wave boundary layers, simulated by solitary motion in an oscillating water tunnel. Two kinds of measurements were made: bed shear stress measurements and velocity measurements. The experiments show that the solitary-motion boundary layer experiences three kinds of flow regimes as the Reynolds number is increased: (i) laminar regime; (ii) laminar regime where the boundary-layer flow experiences a regular array of vortex tubes near the bed over a short period of time during the deceleration stage; and (iii) transitional regime characterized with turbulent spots, revealed by single/multiple, or, sometimes, quite dense spikes in the bed shear stress traces. Supplementary synchronized flow visualization tests confirmed the presence of the previously mentioned flow features. Information related to flow resistance are also given in the paper.

U2 - 10.1017/S0022112009992837

DO - 10.1017/S0022112009992837

JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

SN - 0022-1120

VL - 646

SP - 207

EP - 231

ER -