粒子の浮遊運動と河床付近の流れ

Abstract

Stochastic model of particle suspension is investigated by experimental and theoretical ap-proaches. Particle motion and turbulent flow near the rough bottom, which is visualized by dye, is photographed at a same time and the forces acting on the particles when they are lifted up fromthe bottom and are moving in the flow are discussed from the results. Further, the structure ofturbulent flow on the rough bottom, which is visualized by hydrogen bubble technique, is investi-gated about the periodisity and the time scale of upward flow. Then stochastic model of suspendedparticles is formulated from the mechanism of particle suspension, the structure of turbulent flowand equation of particle motion.