Abstract
Channel processes with bank erosion in unsteady open channel flows are investigated in this paper by numerical analysis. As bank erosion and deposition occur with the lapse of time, the area of the numerical object changes with moving the boundaries. Therefore a moving boundary fitted coordinate system is used to analyze the channel process. The model is applied to experiments for the channel processes with bank erosion of straight and meandering channels. The model is verified for the widening process of straight channel, and modified for the meandering channel process by introducing equations of secondary flow component.
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