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dc.contributor.authorNichols, Andrew*
dc.contributor.authorTait, Simon J.*
dc.contributor.authorHoroshenkov, Kirill V.*
dc.contributor.authorShepherd, Simon J.*
dc.date.accessioned2016-09-08T15:02:28Z
dc.date.available2016-09-08T15:02:28Z
dc.date.issued2016-05-16
dc.identifier.citationNichols A, Tait SJ, Horoshenkov KV and Shepherd SJ (2016) A model of the free surface dynamics of shallow turbulent flows. Journal of Hydraulic Research. 54(5): 516-526.en_US
dc.identifier.urihttp://hdl.handle.net/10454/8942
dc.descriptionYesen_US
dc.description.abstractUnderstanding the dynamic free surface of geophysical flows has the potential to enable direct inference of the flow properties based on measurements of the free surface. An important step is to understand the inherent response of free surfaces in depth-limited flows. Here a model is presented to demonstrate that free surface oscillatory spatial correlation patterns result from individual surface features oscillating vertically as they advect over space and time. Comparison with laboratory observations shows that these oscillating surface features can be unambiguously explained by simple harmonic motion, whereby the oscillation frequency is controlled by the root-mean-square water surface fluctuation, and to a lesser extent the surface tension. This demonstrates that the observed “complex” wave pattern can be simply described as an ensemble of spatially and temporally distributed oscillons. Similarities between the oscillon frequency and estimated frequency of near-bed bursting events suggest that oscillon behaviour is linked with the creation of coherent flow structures.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1080/00221686.2016.1176607en_US
dc.rights© 2016 The Authors. This is an Open Access article licensed under the Creative Commons CC-BY license (http://creativecommons.org/licenses/by/4.0/)en_US
dc.subjectAir–water interface interactions; Flow visualisation and imaging; Laboratory studies; Shallow flows; Solitary waves; Streams and riversen_US
dc.titleA model of the free surface dynamics of shallow turbulent flowsen_US
dc.status.refereedYesen_US
dc.date.Accepted2016-04-06
dc.typeArticleen_US
dc.type.versionpublished version paperen_US
refterms.dateFOA2018-07-25T13:06:05Z


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