Permeation of oil-in-water emulsions through coalescing filter: Two-dimensional simulation based on phase-field model

Yasushi Mino, Yusuke Kagawa, Hideto Matsuyama, Toru Ishigami

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The permeation of an oil-in-water emulsion through a coalescing filter is studied numerically. Our simulation model is based on the phase-field model owing to its simple description of the wetting behavior of oil droplets on versatile surfaces. To realize two-dimensional (2D) simulations of the coalescing processes, we construct a 2D filter model which describes the cross-sectional structure of a fibrous filter in a simple manner. We investigate the effects of wettability, permeation flux, and fiber diameter on coalescing behavior. Oil droplets attach to the fibers and coalesce with each other, forming a bridging structure between fibers which promotes droplet coalescence unless the bridging structure blocks the entire flow path. This coalescence-promoting effect of the bridging structure is observed under conditions where the fluid velocity inside a pore is relatively large. We demonstrate that our numerical model provides useful information to effectively design a coalescing filter and process. Â

Original languageEnglish
Pages (from-to)2525-2532
Number of pages8
JournalAICHE Journal
Volume62
Issue number7
DOIs
Publication statusPublished - Jul 1 2016
Externally publishedYes

Keywords

  • coalescence
  • computational fluid dynamics (CFD)
  • oil-in-water emulsion
  • oil-water separation
  • phase-field model (PFM)

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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