抄録
Debris flows have been widely analyzed as multi-phase mixing flows in the discipline of continuous mechanics. With steep slope and little particle-liquid interaction, however, they can also be analyzed as a behavior of particle grains and fluids in discrete mechanics respectively. The applicability of Distinct Element Method (DEM), a class of method following the latter framework, was studied for a steep and rolling torrential ravine with the gradient of 22 degrees. The result of DEM simulation shows close similarity in its pattern with measured flow velocity, maximum flow depth, and flow winding at field observed points. Distinct Element Method can be applied to kinetically simulate flow velocity and depth affected by winding in torrential ravines.
