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Numerical modelling of bridges in 2D shallow water flow simulations
Author(s) -
Ratia H.,
Murillo J.,
GarcíaNavarro P.
Publication year - 2014
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.3892
Subject(s) - representation (politics) , flow (mathematics) , shallow water equations , unsteady flow , waves and shallow water , free surface , flood myth , head (geology) , work (physics) , mechanics , computer science , geology , mathematics , engineering , physics , mechanical engineering , philosophy , oceanography , theology , geomorphology , politics , political science , law
SUMMARY Two representations of bridges are presented to fit into simulations based on the 2D SWEs. They include a novel and simple empirical formulation for total head loss caused by bridges which covers all flow regimes: free water surface, partially submerged flow, and fully submerged flow. The performances of the different representations of bridges are assessed using experimental results of steady and unsteady flows, presented for the first time in this work. A case study of a real flood is presented giving insight into the application of the representation techniques to real engineering problems. The proposed solution of a head loss representation together with the novel formulation is shown to be accurate for both steady and unsteady flows, and to perform efficiently for solving the flood case. Copyright © 2014 John Wiley & Sons, Ltd.