Lattice Boltzmann simulations for wall-flow dynamics in porous ceramic diesel particulate filters

Da Young Lee, Gi Wook Lee, Kyu Yoon, Byoungjin Chun, Hyun Wook Jung

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Flows through porous filter walls of wall-flow diesel particulate filter are investigated using the lattice Boltzmann method (LBM). The microscopic model of the realistic filter wall is represented by randomly overlapped arrays of solid spheres. The LB simulation results are first validated by comparison to those from previous hydrodynamic theories and constitutive models for flows in porous media with simple regular and random solid-wall configurations. We demonstrate that the newly designed randomly overlapped array structures of porous walls allow reliable and accurate simulations for the porous wall-flow dynamics in a wide range of solid volume fractions from 0.01 to about 0.8, which is beyond the maximum random packing limit of 0.625. The permeable performance of porous media is scrutinized by changing the solid volume fraction and particle Reynolds number using Darcy's law and Forchheimer's extension in the laminar flow region.

Original languageEnglish
JournalApplied Surface Science
DOIs
Publication statusAccepted/In press - 2017

Keywords

  • Darcy-Forchheimer
  • Diesel particulate filter
  • Lattice Boltzmann method
  • Permeability
  • Pore-scale simulation
  • Porous media

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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