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Investigations of the effective mass diffusivity in a multiphase porous medium with a lattice Boltzmann method

  • K. Zhao
  • , Y. M. Xuan
  • , Q. Li
  • Nanjing University of Science and Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A new mesoscopic lattice Boltzmann algorithm is proposed to predict the mass diffusivity in a porous medium of complex structure at the pore scale. By using the reconstruction technology for porous media, the diffusion mass transfer process in various porous media is studied. The concentration distribution as well as the effective mass diffusivity inside such a complex structure is obtained, without resorting to any empirical parameters determined case by case. Furthermore, the influence of the granular fraction to the effective mass diffusivity as well as the mechanism of this influence is discussed. The calculated effective mass diffusivities are also compared with the Maxwell equation, which indicates that the Maxwell equation is not applicable and the micro-structure, grain (solid matrix) or pore shape become very important to the mass transfer process for some cases.

Original languageEnglish
Title of host publication6th International Symposium on Multiphase flow, Heat Mass Transfer and Energy Conversion
Pages853-858
Number of pages6
DOIs
StatePublished - 2010
Event6th International Symposium on Multiphase flow, Heat Mass Transfer and Energy Conversion - Xian, China
Duration: 11 Jul 200915 Jul 2009

Publication series

NameAIP Conference Proceedings
Volume1207
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference6th International Symposium on Multiphase flow, Heat Mass Transfer and Energy Conversion
Country/TerritoryChina
CityXian
Period11/07/0915/07/09

Keywords

  • Effective mass diffusivity
  • Granular fraction
  • Lattice Boltzmann method
  • Porous medium
  • Reconstruction technology

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