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dc.contributor.authorPu, Jaan H.*
dc.date.accessioned2016-05-09T14:55:12Z
dc.date.available2016-05-09T14:55:12Z
dc.date.issued2015-07-22
dc.identifier.citationPu JH (2015) Turbulence modelling of shallow water flows using Kolmogorov approach. Computers and Fluids. 115: 66-74.en_US
dc.identifier.urihttp://hdl.handle.net/10454/8322
dc.descriptionYesen_US
dc.description.abstractThis study uses an improved k –ε coupled shallow water equations (SWE) model that equipped with the numerical computation of the velocity fluctuation terms to investigate the turbulence structures of the open channel flows. We adapted the Kolmogorov K41 scaling model into the k –ε equations to calculate the turbulence intensities and Reynolds stresses of the SWE model. The presented model was also numerically improved by a recently proposed surface gradient upwind method (SGUM) to allow better accuracy in simulating the combined source terms from both the SWE and k –ε equations as proven in the recent studies. The proposed model was first tested using the flows induced by multiple obstructions to investigate the utilised k –ε and SGUM approaches in the model. The laboratory experiments were also conducted under the non-uniform flow conditions, where the simulated velocities, total kinetic energies (TKE) and turbulence intensities by the proposed model were used to compare with the measurements under different flow non-uniformity conditions. Lastly, the proposed numerical simulation was compared with a standard Boussinesq model to investigate its capability to simulate the measured Reynolds stress. The comparison outcomes showed that the proposed Kolmogorov k –ε SWE model can capture the flow turbulence characteristics reasonably well in all the investigated flows.en_US
dc.description.sponsorshipThe Major State Basic Research Development Program (973 program) of China (No. 2013CB036402)en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1016/j.compfluid.2015.03.010en_US
dc.rights© 2015 Elsevier. Reproduced in accordance with the publisher's selfarchiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)en_US
dc.subjectKolmogorov K41 scaling law; SGUM model; SWE k-ε model; Non-uniform flow experiment; Reynolds stress; Turbulence structuresen_US
dc.titleTurbulence modelling of shallow water flows using Kolmogorov approachen_US
dc.status.refereedYesen_US
dc.date.Accepted2015-03-15
dc.date.application2015-03-20
dc.typeArticleen_US
dc.type.versionAccepted Manuscripten_US
refterms.dateFOA2018-07-25T13:00:09Z


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