NUMERICAL MODELING OF SEDIMENT TRANSPORT FOR VARIOUS MODE

Masanobu Ono, Ichiro Deguchi, Toru Sawaragi

Abstract


There are various mode of sediment transport on sandy beach. They are bed load, suspended load and sheet flow. Until now, various kinds of numerical model for analyzing these sediment transport have been developed based on the assumption of each mode of sediment transport. Consequently, it is difficult to apply them to different mode of sedimentation. In this study, we propose a relatively simple numerical model for simulating sediment motion of various mode based on the semi-multi-phase flow model. The applicability of the model to sheet flow transport and suspended load transport is examined by using existing experimental data. The results show that for the suspended sediment, it is necessary to take into the effect of the vortex to lift up sediment to high position. To construct numerical model for simulating sediment transport phenomena of the various mode , we have to introduce generation , development and disappearance process of bed ripple in this model.

Keywords


sediment transport; numerical modeling; various mode

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