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dc.contributor.authorHoroshenkov, Kirill V.
dc.contributor.authorNichols, Andrew
dc.contributor.authorTait, Simon J.
dc.contributor.authorMaximov, G.A.
dc.date.accessioned2016-10-07T13:08:02Z
dc.date.available2016-10-07T13:08:02Z
dc.date.issued2013
dc.identifier.citationHoroshenkov KV, Nichols A, Tait SJ and Maximov GA (2013) The pattern of surface waves in a shallow free surface flow. Journal of Geophysical Research. 118 (3): 1864-1876.
dc.identifier.urihttp://hdl.handle.net/10454/9579
dc.descriptionYes
dc.description.abstractThis work presents new water surface elevation data including evidence of the spatial correlation of water surface waves generated in shallow water flows over a gravel bed without appreciable bed forms. Careful laboratory experiments have shown that these water surface waves are not well-known gravity or capillary waves but are caused by a different physical phenomenon. In the flow conditions studied, the shear present in shallow flows generates flow structures, which rise and impact on the water-air interface. It is shown that the spatial correlation function observed for these water surface waves can be approximated by the following analytical expression W(rho) = e(-rho 2/2 sigma w2)COS(2 pi L-0(-1)rho). The proposed approximation depends on the spatial correlation radius, sigma(w), characteristic spatial period, L-0, and spatial lag, . This approximation holds for all the hydraulic conditions examined in this study. It is shown that L-0 relates to the depth-averaged flow velocity and carries information on the shape of the vertical velocity profile and bed roughness. It is also shown that sigma(w) is related to the hydraulic roughness and the flow Reynolds number.
dc.relation.isreferencedbyhttp://dx.doi.org/10.1002/jgrf.20117
dc.rights(c) 2013 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (https://creativecommons.org/licenses/by/3.0/)
dc.subjectTurbulence
dc.subject; Water flow
dc.subject; Surface waves
dc.subject; Gravel-bed river
dc.subject; Open-channel flow
dc.subject; Turbulent-flow
dc.subject; Roughness
dc.subject; Dynamics
dc.titleThe pattern of surface waves in a shallow free surface flow
dc.status.refereedYes
dc.typeArticle
dc.type.versionPublished version
refterms.dateFOA2018-07-25T15:05:24Z


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