H333 鉛直ダクト内粒子沈降流中で形成される粒子クラスターの計測と数値解析

概要

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An experiment and numerical simulation of gas-solid flow with particle clusters were performed. In the experiment, a local solid-concentration measuring system by using fiber optics was developed and applied to the particle-sedimenting flow in a vertical duct. The Distribution of solid concentration in a cross section and the fluctuation of local solid-concentration were mesured. The conditions of the numerical simulation are corresponding to the experiment. In the simulation, the Lagrangean/Eulerian approach and the two-way coupling were adopted because the solid phase largely affects the gas flow. The gas flow was solved by means of the direct numerical simulation (DNS). The motion of individual particles was calculated taking account of particle-particle collision by determininsic method. The calculated results were compared with the experimental ones, such as fluctuations of local solid volume fraction and spatial cluster structures observed by means of a laser sheet.
日本流体力学会の論文
2001-07-31