Abstract
A mathematical model which describes three-dimensional fully-developed flow in mildly curved channel is presented. The side boundary layer is included in the analysis, and the secondary flow is treated to be impervious at the side walls. It is found that the advective transport of fluid momentum due to secondary flow induces accumulation of longitudinal fluid velocity near the outer bank. The analysis makes it possible to treat the excess of shear stress at the outer bank due to curvature. The model is supported by available laboratory data.
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