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http://hdl.handle.net/10773/23663
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DC Field | Value | Language |
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dc.contributor.author | Abreu, Tiago | pt |
dc.contributor.author | Michallet, Hervé | pt |
dc.contributor.author | Silva, Paulo A. | pt |
dc.contributor.author | Sancho, Francisco | pt |
dc.contributor.author | Van Der A, Dominic A. | pt |
dc.contributor.author | Ruessink, B. G. | pt |
dc.date.accessioned | 2018-06-26T13:52:49Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 0378-3839 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/23663 | - |
dc.description.abstract | We present a new formulation to predict the bed shear stress under skewed/asymmetric oscillatory flows (with or without a co-linear mean current), extending the work of Nielsen (1992). The nonlinearity of the oscillatory flow is incorporated through the use of two parameters: the index of skewness or nonlinearity, and the waveform parameter. The new formulation is tested against the bed shear stress estimated from the log-fit and momentum-integral methods, using oscillatory data from oscillating water tunnel experiments. The new formulation and the momentum-integral method agree well, but differ from those with the log-fit method, possibly because both methodologies lead to different results for the phase lead between the bed shear stress and the free-stream velocity. The new bed shear stress formulation is incorporated in a quasi-steady bedload formula, and accurately reproduces net transport rates under non-linear, nonbreaking waves with and without an opposing current. | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/3599-PPCDT/111230/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | Acceleration skewness | pt |
dc.subject | Bed shear stress | pt |
dc.subject | Mobile bed | pt |
dc.subject | Oscillatory flow tunnel | pt |
dc.subject | Sand transport | pt |
dc.subject | Velocity skewness | pt |
dc.title | Bed shear stress under skewed and asymmetric oscillatory flows | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 1 | pt |
degois.publication.lastPage | 10 | pt |
degois.publication.title | Coastal Engineering | pt |
degois.publication.volume | 73 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.doi | 10.1016/j.coastaleng.2012.10.001 | pt |
Appears in Collections: | CESAM - Artigos DFis - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Abreu et al. - 2013 - Bed shear stress under skewed and asymmetric oscil.pdf | 912.25 kB | Adobe PDF |
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