MOVEMENT MECHANISM OF NON-SPHERICAL PARTICLES FLOWING DOWN IN A TURBULENT FLOW OVER A ROUGH-BED CHANNEL BY THE IMAGE ANALYSIS AND THE NUMERICAL SIMULATION

Abstract

 Video image analyses and numerical simulations were conducted about motions of non-spherical particles in a turbulent flow over a rough-bed channel, to reveal the effect of the particle shape on saltation motions.

 First, video image analyses revealed the effect of the shape on the transport manner of non-spherical particles. Secondaly, it was shown that numerical simulations using the APM method explain the transport manner and the movement velocity of non-spherical particles in a turbulent flow over a rough-bed channel.