Equivalent diameter and shape factor of non-spherical particles based on an evaluation of flowability

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06542
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Properties in chemical engineering process/Transfer operation/Unit operation
• Research Institution: Okayama University
• Principal Investigator: GOTOH Kuniaki 岡山大学, 自然科学研究科, 教授 (20215487)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 粉体流動性 / 付着力 / 流体抵抗力 / 相対付着性評価 / 音叉式粘度計 / 見かけ粘度

Outline of Final Research Achievements

For the purpose of establishing the quantitative evaluation of so-called "flowability", the local flowability evaluation method and the particle-solid adhesiveness evaluation method were investigated.
Regarding the evaluation of local fluidity, I tried applying a tuning fork viscometer and clarified that the apparent flow resistance of inorganic particles and organic particles of nano order to several tens of microns can be measured by improving the apparatus.
As for the particle-solid adhesiveness, by defining the ratio of the square of the Hamaker constant and the separation distance as a relative adhesion index newly, it is possible to estimate adhesion force between particle and solid wall based on the comparison of removal efficiencies between the reference particle-wall combination and target combination of particle and wall.

Free Research Field

化学工学、粉体工学