G0501-2-2 球状の粒子クラスタが自由落下する場合の数値解析(液滴,噴霧)

概要

論文の詳細を見る
When powder fomis a weak intemelion particle cluster in a gas-solid flow, the rate of fitil of the cluster exceeds the temiinal velocity of the individual particles. However, the relationship between the unsteady characteristics of the free-fall of the particle cluster and the geometric condition of the experiment is not clear. We performed the numerical analysis of the particle cluster that flee-gills in still air. The Hard Sphere Model and the Direct Numerical Simulation were used for the numerical analysis. The initial condition of the cluster is a ball of a diameter of 3.0mm and void fraction is 0.654. Reynolds number based on the cluster diameter is about 700. By this numerical simulation, the processes from the development to the decay of the particle cluster became clear. It was found that the particle cluster falling with ball shape changes to bowl shape along the flow pattern around the sphere and the decay begings with the lower edge of the centre axis.
一般社団法人日本機械学会の論文
2009-09-12