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A numerical model for flow in meandering channels with natural bed topography
Author(s) -
Demuren A. O.
Publication year - 1993
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/92wr02907
Subject(s) - curvilinear coordinates , turbulence , flow (mathematics) , closure (psychology) , geology , mechanics , cartesian coordinate system , finite volume method , geometry , meander (mathematics) , basis (linear algebra) , streamlines, streaklines, and pathlines , computer simulation , mathematics , physics , economics , market economy
A finite‐volume numerical model is presented for the calculation of three‐dimensional turbulent flow in meandering channels with natural bed configuration. The governing equations are written in a general curvilinear coordinate system so that all singly connected geometrical configurations can be accommodated. For simplicity, the Cartesian velocity components are retained as dependent variables. The numerical procedure is very general so that it can deal with complex cross sections and separated flow. Turbulence closure is through the standard k‐ϵ model. Computed results show good agreement with experimental data in meandering channels with rectangular and natural bed configurations. This work provides a hydrodynamic basis for the study of the mechanisms for the formation of river meanders.