非球形粒子の気流中運動に関するモデル化と数値シミュレーション

Non-spherical particle motion was analyzed and modeled by means of the direct numerical simulation of the six degrees of freedom motion with the Arbitrary Lagrangian-Eulerian method in which the effect of particle rotation and oscillation could be considered. In addition, the proposed motion model was implemented into the point-source based Eulerian-Lagrangian large-eddy simulation code and applied to the coaxial jet flow. Results showed that the behavior of the spherical and non-spherical particles' dispersion observed in the experiments could be captured precisely by the computation. Moreover, the particle dispersion was discussed in detail with the dispersion width and the radial distribution function. It was suggested that the characteristics of the particle dispersion was characterized by the apparent Stokes number which the particle size distribution and the particle shape significantly affects.