Development of a method for determining the maximum van der Waals force to analyze dispersion and aggregation of particles in a suspension

Kizuku Kushimoto, Shingo Ishihara, Samuel Pinches, Mitchell L. Sesso, Shane P. Usher, George V. Franks, Junya Kano

Research output: Contribution to journalArticle

Abstract

A new method for determining the maximum value of the van der Waals force, Fv,max, has been developed to analyze the dispersion and aggregation behavior of primary particles in a suspension. The simulation method considered the van der Waals force, the electrical double-layer force and the lubrication force as remote inter-primary-particle interaction forces. Distinct Element Method (DEM) was applied to tracking the motion of primary particles, and DEM was coupled with Computational Fluid Dynamics (CFD) by DEM-CFD coupling model to represent the motion in liquid. Aggregate size distributions (ASDs) were measured and simulated at different pHs and shear rates in order to determine the Fv,max and to validate the proposed method. The simulated ASDs qualitatively agreed with the experimental values in general. The result, therefore, indicates that the dispersion and aggregation behavior of primary particles could be analyzed by using the Fv,max determined by the proposed method.

Original languageEnglish
Pages (from-to)2267-2275
Number of pages9
JournalAdvanced Powder Technology
Volume31
Issue number6
DOIs
Publication statusPublished - 2020 Jun

Keywords

  • Aggregation
  • DEM
  • DEM-CFD
  • Simulation
  • Suspension

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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