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Large eddy simulation of free-surface flows

McSherry, RJ; Chua, KV; Stoesser, T; (2017) Large eddy simulation of free-surface flows. Journal of Hydrodynamics, Ser. B , 29 (1) pp. 1-12. 10.1016/S1001-6058(16)60712-6. Green open access

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Abstract

This paper introduces and discusses numerical methods for free-surface flow simulations and applies a large eddy simulation (LES) based free-surface-resolved CFD method to a couple of flows of hydraulic engineering interest. The advantages, disadvantages and limitations of the various methods are discussed. The review prioritises interface capturing methods over interface tracking methods, as these have shown themselves to be more generally applicable to viscous flows of practical engineering interest, particularly when complex and rapidly changing surface topologies are encountered. Then, a LES solver that employs the level set method to capture free-surface deformation in 3-D flows is presented, as are results from two example calculations that concern complex low submergence turbulent flows over idealised roughness elements and bluff bodies. The results show that the method is capable of predicting very complex flows that are characterised by strong interactions between the bulk flow and the free-surface, and permits the identification of turbulent events and structures that would be very difficult to measure experimentally.

Type: Article
Title: Large eddy simulation of free-surface flows
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/S1001-6058(16)60712-6
Publisher version: https://doi.org/10.1016/S1001-6058(16)60712-6
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Large Eddy Simulation, free-surface, Level Set Method, Volume of Fluid
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10058101
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