Modeling and observation of acceleration-skewed oscillatory flow over fixed beds

Alan G. Davies; Dominic A. van der A; Tom O' Donoghue; Jan S. Ribberink

Modeling and observation of acceleration-skewed oscillatory flow over fixed beds

Alan G. Davies
, Dominic A. van der A
, Tom O' Donoghue
, Jan S. Ribberink

Marine and Fluvial Systems

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

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Abstract

Recent interest in the effects on net sediment transport of acceleration skewness beneath steep and breaking waves has highlighted the lack of detailed process measurements available, not least of the hydrodynamics. This has motivated a series of experiments, involving ‘sawtooth’ waves, to be conducted above fixed rough beds. This paper focuses on comparisons between the new data and a 1DV k-ε turbulence-closure model. The results presented examine (i) the evolution of velocity profiles through the sawtooth wave cycle, (ii) the asymmetry in the turbulence intensities and shear stresses during the cycle and (iii) the residual currents generated in the (implied) offshore direction by turbulence-asymmetry. The general implications for sediment transport are also considered.

Original language	English
Title of host publication	PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool
Subtitle of host publication	Process studies in the pre-operational era: Program and Abstracts
Editors	A.J. Souza, A. Lane
Pages	115-118
Publication status	Published - 25 Aug 2008
Event	14th Physics of Estuaries and Coastal Seas Conference, PECS 2008 - Liverpool, United Kingdom Duration: 25 Aug 2008 → 29 Aug 2008 Conference number: 14 http://2008.pecs-conferences.org/

Conference

Conference	14th Physics of Estuaries and Coastal Seas Conference, PECS 2008
Abbreviated title	PECS
Country/Territory	United Kingdom
City	Liverpool
Period	25/08/08 → 29/08/08
Internet address	http://2008.pecs-conferences.org/

Keywords

Oscillatory boundary layer
Turbulence
Waves
Wave-induced flow

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http://2008.pecs-conferences.org/abstracts.html

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Davies, A. G., van der A, D. A., O' Donoghue, T., & Ribberink, J. S. (2008). Modeling and observation of acceleration-skewed oscillatory flow over fixed beds. In A. J. Souza, & A. Lane (Eds.), PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool: Process studies in the pre-operational era: Program and Abstracts (pp. 115-118) http://2008.pecs-conferences.org/abstracts.html

@inproceedings{0ba7dec0e6974404ba6a54708e5834cf,

title = "Modeling and observation of acceleration-skewed oscillatory flow over fixed beds",

abstract = "Recent interest in the effects on net sediment transport of acceleration skewness beneath steep and breaking waves has highlighted the lack of detailed process measurements available, not least of the hydrodynamics. This has motivated a series of experiments, involving {\textquoteleft}sawtooth{\textquoteright} waves, to be conducted above fixed rough beds. This paper focuses on comparisons between the new data and a 1DV k-ε turbulence-closure model. The results presented examine (i) the evolution of velocity profiles through the sawtooth wave cycle, (ii) the asymmetry in the turbulence intensities and shear stresses during the cycle and (iii) the residual currents generated in the (implied) offshore direction by turbulence-asymmetry. The general implications for sediment transport are also considered.",

keywords = "Oscillatory boundary layer, Turbulence, Waves, Wave-induced flow",

author = "Davies, \{Alan G.\} and \{van der A\}, \{Dominic A.\} and \{O' Donoghue\}, Tom and Ribberink, \{Jan S.\}",

year = "2008",

month = aug,

day = "25",

language = "English",

pages = "115--118",

editor = "A.J. Souza and A. Lane",

booktitle = "PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool",

note = "14th Physics of Estuaries and Coastal Seas Conference, PECS 2008, PECS ; Conference date: 25-08-2008 Through 29-08-2008",

url = "http://2008.pecs-conferences.org/",

}

Davies, AG, van der A, DA, O' Donoghue, T & Ribberink, JS 2008, Modeling and observation of acceleration-skewed oscillatory flow over fixed beds. in AJ Souza & A Lane (eds), PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool: Process studies in the pre-operational era: Program and Abstracts. pp. 115-118, 14th Physics of Estuaries and Coastal Seas Conference, PECS 2008, Liverpool, United Kingdom, 25/08/08. <http://2008.pecs-conferences.org/abstracts.html>

Modeling and observation of acceleration-skewed oscillatory flow over fixed beds. / Davies, Alan G.; van der A, Dominic A.; O' Donoghue, Tom et al.
PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool: Process studies in the pre-operational era: Program and Abstracts. ed. / A.J. Souza; A. Lane. 2008. p. 115-118.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

TY - GEN

T1 - Modeling and observation of acceleration-skewed oscillatory flow over fixed beds

AU - Davies, Alan G.

AU - van der A, Dominic A.

AU - O' Donoghue, Tom

AU - Ribberink, Jan S.

N1 - Conference code: 14

PY - 2008/8/25

Y1 - 2008/8/25

N2 - Recent interest in the effects on net sediment transport of acceleration skewness beneath steep and breaking waves has highlighted the lack of detailed process measurements available, not least of the hydrodynamics. This has motivated a series of experiments, involving ‘sawtooth’ waves, to be conducted above fixed rough beds. This paper focuses on comparisons between the new data and a 1DV k-ε turbulence-closure model. The results presented examine (i) the evolution of velocity profiles through the sawtooth wave cycle, (ii) the asymmetry in the turbulence intensities and shear stresses during the cycle and (iii) the residual currents generated in the (implied) offshore direction by turbulence-asymmetry. The general implications for sediment transport are also considered.

AB - Recent interest in the effects on net sediment transport of acceleration skewness beneath steep and breaking waves has highlighted the lack of detailed process measurements available, not least of the hydrodynamics. This has motivated a series of experiments, involving ‘sawtooth’ waves, to be conducted above fixed rough beds. This paper focuses on comparisons between the new data and a 1DV k-ε turbulence-closure model. The results presented examine (i) the evolution of velocity profiles through the sawtooth wave cycle, (ii) the asymmetry in the turbulence intensities and shear stresses during the cycle and (iii) the residual currents generated in the (implied) offshore direction by turbulence-asymmetry. The general implications for sediment transport are also considered.

KW - Oscillatory boundary layer

KW - Turbulence

KW - Waves

KW - Wave-induced flow

M3 - Conference contribution

SP - 115

EP - 118

BT - PECS 2008: Physics of Estuaries and Coastal Seas, 25–29th August, Liverpool

A2 - Souza, A.J.

A2 - Lane, A.

T2 - 14th Physics of Estuaries and Coastal Seas Conference, PECS 2008

Y2 - 25 August 2008 through 29 August 2008

ER -

Modeling and observation of acceleration-skewed oscillatory flow over fixed beds

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