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Modelling and analyzing flow diversion in branching channels with symmetric geometry
Author(s) -
Yousefi Somayeh,
Ghiassi Reza,
Yousefi Saied
Publication year - 2011
Publication title -
river research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.679
H-Index - 94
eISSN - 1535-1467
pISSN - 1535-1459
DOI - 10.1002/rra.1393
Subject(s) - branching (polymer chemistry) , geology , eddy , numerical models , numerical analysis , channel (broadcasting) , hydrology (agriculture) , alluvium , computer simulation , flow (mathematics) , geometry , hydraulic jump , numerical modeling , geomorphology , mechanics , geotechnical engineering , turbulence , mathematics , physics , geophysics , engineering , mathematical analysis , materials science , electrical engineering , composite material
This paper aims at the investigation and analysis of numerical and laboratory modelling of flow in branched channels with symmetrical geometry and varying hydraulic conditions. Details of velocity and water‐level profiles in branching locations are discussed. In some low‐slop regions like plains, rivers may be branching; or in alluvial plains where the slop is low, meanders may appear. On the other hand, in the mountainous and semi‐mountainous areas with relatively steep slops, arterial rivers can be formed. Therefore, it is important to learn the behaviour of rivers in branching location and to simulate water flow in branching part of rivers. Details of two‐dimensional numerical model in a main channel and secondary downstream branches are explained and results are analysed and compared against experimental data. With respect to the numerical simulation, velocity and depth in different sections of laboratory model are calculated and the corresponding profiles are developed. The water‐level profiles are calculated and drawn using both the numerical and experimental models. Some long narrow eddies are predicted along internal bank of junction. The comparison of numerical and experimental models proves reasonable results for this research. Copyright © 2010 John Wiley & Sons, Ltd.