S0504-5-5 自由落下する固体粒子群が誘起する気流の渦法シミュレーション(噴流,後流および剥離流れの流動解析と応用(その5))

概要

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The air flow induced by small solid particles falling in an unbounded air is simulated. The particles, initially arranged within a spherical region in a quiescent air, are made to fall. Their fall induces the air flow. The particle diameter and density are 1 mm and 7.7 kg/m^3 respectively. A grid-free method based on a vortex method is applied. The simulation demonstrates that the particles are accelerated by the induced downward air flow just after the commencement of their fall. It also highlights that the particles are whirled up by a vortex ring produced behind them after the acceleration. The effect of the particle volume fraction at the commencement of the fall is also explored.
一般社団法人日本機械学会の論文
2009-09-12