Author(s): Jinn-Chuang Yang; Jenn-Yeong Wang; Chia-Lin Wang
Linked Author(s): Jinn-Chuang Yang
Keywords: No Keywords
Abstract: In dealing with the transient sediment transport problem, the commonly-used uncoupled model may not be suitable. The uncoupling technique has intended to separate the physical coupling phenomenon of water flow and sediment transport into two independent processes. So that very often the simulation of transient sediment transport in alluvial channel appears the severe numerical oscillation and solution instability problems. The coupled model which simultaneously solves water flow continuity, momentum and sediment continuity equations gives less numerical oscillation and solution instability problems. In this article, a coupled model with the use of matrix double-sweep method to solve the system of nonlinear algebraic equations has been developed. For the purpose of taking into account the nonuniform mixture in the model, the sorting and armoring processes are incorporated into the model. Due to the need of performing the book-keeping procedure for the sorting process, it is necessary to decouple this part of computation. The new model has been developed and briefly introduced in this article.
Year: 1989