Resolving wave and laminar boundary layer scales for gap resonance problems

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Abstract

Free surface oscillations in a narrow gap between elongated parallel bodies are studied numerically. As this represents both a highly resonant system and an arrangement of relevance to offshore operations, the nature of the damping is of primary interest, and has a critical role in determining the response. Previous experimental work has suggested that the damping could be attributed to laminar boundary layers; here our numerical wave tank successfully resolves both wave and boundary layer scales to provide strong numerical evidence in support of this conclusion. The simulations follow the experiments in using wave groups so that the computation is tractable, and both linear and second harmonic excitation of the gap are demonstrated.

Original languageEnglish
Pages (from-to)759-775
Number of pages17
JournalJournal of Fluid Mechanics
Volume866
DOIs
Publication statusPublished - 10 May 2019

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laminar boundary layer
Laminar boundary layer
Damping
damping
harmonic excitation
boundary layers
Boundary layers
oscillations
simulation
Experiments

Cite this

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title = "Resolving wave and laminar boundary layer scales for gap resonance problems",
abstract = "Free surface oscillations in a narrow gap between elongated parallel bodies are studied numerically. As this represents both a highly resonant system and an arrangement of relevance to offshore operations, the nature of the damping is of primary interest, and has a critical role in determining the response. Previous experimental work has suggested that the damping could be attributed to laminar boundary layers; here our numerical wave tank successfully resolves both wave and boundary layer scales to provide strong numerical evidence in support of this conclusion. The simulations follow the experiments in using wave groups so that the computation is tractable, and both linear and second harmonic excitation of the gap are demonstrated.",
keywords = "wave-structure interactions",
author = "H. Wang and Wolgamot, {H. A.} and S. Draper and W. Zhao and Taylor, {P. H.} and L. Cheng",
year = "2019",
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language = "English",
volume = "866",
pages = "759--775",
journal = "Journal of Fluid Mechanics.",
issn = "0022-1120",
publisher = "Cambridge University Press",

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T1 - Resolving wave and laminar boundary layer scales for gap resonance problems

AU - Wang, H.

AU - Wolgamot, H. A.

AU - Draper, S.

AU - Zhao, W.

AU - Taylor, P. H.

AU - Cheng, L.

PY - 2019/5/10

Y1 - 2019/5/10

N2 - Free surface oscillations in a narrow gap between elongated parallel bodies are studied numerically. As this represents both a highly resonant system and an arrangement of relevance to offshore operations, the nature of the damping is of primary interest, and has a critical role in determining the response. Previous experimental work has suggested that the damping could be attributed to laminar boundary layers; here our numerical wave tank successfully resolves both wave and boundary layer scales to provide strong numerical evidence in support of this conclusion. The simulations follow the experiments in using wave groups so that the computation is tractable, and both linear and second harmonic excitation of the gap are demonstrated.

AB - Free surface oscillations in a narrow gap between elongated parallel bodies are studied numerically. As this represents both a highly resonant system and an arrangement of relevance to offshore operations, the nature of the damping is of primary interest, and has a critical role in determining the response. Previous experimental work has suggested that the damping could be attributed to laminar boundary layers; here our numerical wave tank successfully resolves both wave and boundary layer scales to provide strong numerical evidence in support of this conclusion. The simulations follow the experiments in using wave groups so that the computation is tractable, and both linear and second harmonic excitation of the gap are demonstrated.

KW - wave-structure interactions

UR - http://www.scopus.com/inward/record.url?scp=85063141399&partnerID=8YFLogxK

U2 - 10.1017/jfm.2019.115

DO - 10.1017/jfm.2019.115

M3 - Article

VL - 866

SP - 759

EP - 775

JO - Journal of Fluid Mechanics.

JF - Journal of Fluid Mechanics.

SN - 0022-1120

ER -