Seamless numerical method for flows including dense solid particles with large size difference

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420122
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Osaka University
• Principal Investigator: Tsuji Takuya 大阪大学, 工学(系)研究科(研究院), 准教授 (90379123)
• Co-Investigator(Kenkyū-buntansha): NAGAHASHI Yusumi 高知工業高等専門学校, 教授 (80208040) ; TANAKA Toshitsugu 大阪大学, 大学院工学研究科, 教授 (90171777)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 仮想粒子法 / DEM-CFD / 固気二相流 / 混相流 / 数値シミュレーション / 流動層 / 偏析

Outline of Final Research Achievements

In the present study, we focus on dense gas-solid flows typically occur in fluidized bed applications. A new Euler - Lagrange numerical model, which can reproduce and predict the motion of flows including dense solid particles with large size difference, was newly proposed. Along with the model development, experiments using a bench-scale fluidized bed were also performed for the validation study of the proposed numerical model. The motion of single large solid particles in bubbling fluidized conditions was compared in detail between the proposed model and the experiment. From the results, it was confirmed that the proposed model has a quantitative and qualitative predictive performance despite of the complexity of phenomenon. Moreover, it was also found the behavior of bubbles spontaneously occur in the bed gives major effects on the motion of the large particles in beds.

Free Research Field

流体工学