CFD–DEM simulations of wet particles fluidization with a new evolution model for liquid bridge

Leina Hua, Raffaella Ocone, Ning Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A new model for liquid-bridge evolution with consideration of particle dynamics, is proposed to improve Computational Fluid Dynamics-Discrete Element Method (CFD–DEM) simulations of wet particles fluidization under high liquid loading and viscosity. A liquid bridge is allowed to form and remains stable only when the normal relative velocity of two particles is lower than a critical value vnc. A large vnc leads to an increase of liquid-bridge or cohesive force. The model can be reduced to the conventional liquid-bridge model in literature when vnc = 0 or ∞. With the new model, the prediction of bubble properties including bubble center, aspect ratio, and volume agrees well with the experimental data in literature. In particular, under high liquid loading, bubble disintegration due to particle agglomerating is reasonably captured. The simulations demonstrate the advantage of the new model that can extend the liquid-bridge models and CFD–DEM for high liquid loading and viscosity.

Original languageEnglish
JournalAIChE Journal
Early online date16 Mar 2022
DOIs
Publication statusE-pub ahead of print - 16 Mar 2022

Keywords

  • fluidization
  • liquid loading
  • liquid viscosity
  • numerical simulation

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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