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dc.contributor.authorCreed, MJen
dc.contributor.authorDraper, Sen
dc.contributor.authorNishino, Ten
dc.contributor.authorBorthwick, AGLen
dc.date.accessioned2021-08-22T17:08:03Z
dc.date.available2021-08-22T17:08:03Z
dc.date.issued2017-04-01en
dc.identifier.issn1364-5021en
dc.identifier.urihttp://hdl.handle.net/10026.1/17713
dc.description.abstract

A theoretical model, informed by numerical simulations based on the shallow water equations, is developed to predict the flow passing through and around a uniform porous obstacle in a shallow channel, where background friction is important. This problem is relevant to a number of practical situations, including flow through aquatic vegetation, the performance of arrays of turbines in tidal channels and hydrodynamic forces on offshore structures. To demonstrate this relevance, the theoretical model is used to (i) reinterpret core flow velocities in existing laboratory-based data for an array of emergent cylinders in shallow water emulating aquatic vegetation and (ii) reassess the optimum arrangement of tidal turbines to generate power in a tidal channel. Comparison with laboratory-based data indicates a maximum obstacle resistance (or minimum porosity) for which the present theoretical model is valid. When the obstacle resistance is above this threshold the shallow water equations do not provide an adequate representation of the flow, and the theoretical model over-predicts the core flow passing through the obstacle. The second application of the model confirms that natural bed resistance increases the power extraction potential for a partial tidal fence in a shallow channel and alters the optimum arrangement of turbines within the fence.

en
dc.language.isoenen
dc.titleFlow through a very porous obstacle in a shallow channelen
dc.typeJournal Article
plymouth.issue2200en
plymouth.volume473en
plymouth.publication-statusPublisheden
plymouth.journalProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciencesen
dc.identifier.doi10.1098/rspa.2016.0672en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.identifier.eissn1471-2946en
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1098/rspa.2016.0672en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.typeJournal Article/Reviewen


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