2006 Volume 50 Pages 787-792
A numerical simulation method has been developed for describing the behavior of driftwoods motion and their accumulation process in meandering channel with bridge piers and the forested gravel bar. The present model has been composed of Eulerian analysis of fluid motion given by depth-averaged flow analysis and of Lagragian analysis of driftwoods motion by using the extended Distinct Element Method (DEM), which can simulate the motion of driftwood as the rigid body. The calculation results show time-depended process of driftwood accumulation in front of bridge piers including the effect of the forested bar and also show the amount of dam-up water level due to jamming of driftwoods.
