Smoothed Particle Hydrodynamics (SPH)法による粒状体の流れの数値解析と実験との比較(流体工学,流体機械)

概要

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Numerical simulation of velocity and stress fields for flowing powder comprised of an infinite number of particles presents a most difficult problem in powder technology. The Distinct Element Method (DEM) is useful for determining each particle trajectory which involves multi-body interactions. However, total particle can not be computed using DEM. The particle number which can be calculated for a three-dimensional spherical system would be in the hundreds of thousands. A description of flow characteristics for a small amount of powder would not be paractical. Simulation within a tank would thus be virtually impossible. The authors have conducted numerical simulation of flowing powder using the smoothed particle hydrodynamics (SPH) through application of continuum dynamics. Glass beads (particle diameter : 100 μm) were used in the present study as test powder stored in a tank and discharged by gravitational force. Calculated velocity distribution, free surface in the tank and the rate of discharge were compared with experimental data and a good agreement was noted. Based on the results of this study, SPH in conjunction with the model equation for yield stress appears quite useful for simulating the flow of fine powder.
一般社団法人日本機械学会の論文
2003-06-25