Author(s): B. L. Jayaratne; N. Tamai; Y. Kawahara
Linked Author(s):
Keywords: Compound meandering channel; Phase shift; Over bank flow; Waterstage; K-εmodel
Abstract: Flow structures in a compound meandering channel where flood plain levees are shifted ahead by 30°, were investigated experimentally for shallow and deep water over bank flow conditions in order to understand the effect of phase shift as well as water stage on flow behaviour. Flow in compound meandering channels with parallel levees has also been studied. Flow structures in compound meandering channels strongly depend on several factors including meandering wave length, curvature, phase shift of levees and water stage etc. The resultant influence caused by these factors on inertia force (main driving force), centrifugal force and flow mixing etc, makes the flow complex and three dimensional. Three-dimensional mathematical model with standard k-ε method was applied to simulate the flow. It reveals that standard k-εmodel can be adopted to regenerate the compound meandering channel flow with sufficient accuracy except the flow separation reaches.
Year: 2001