Impact of porosity and particle size on diffusion in porous media : a 2d Lattice Boltzmann approach
Espinoza-Andaluz, Mayken LU ; Ordoñez-Saca, Brayan ; Santana-Villamar, Jordy ; Vallejo-Cervantes, Carlos and Andersson, Martin LU
(2025)
ASME 2025 International Mechanical Engineering Congress and Exposition, IMECE 2025
In ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
7.
- Abstract
The study of fluid transport in porous media is crucial for many applications in science and engineering. From a modeling perspective, understanding how diffusion parameters behave when microstructural variations are taken into account is a significant step toward achieving more detailed and accurate model predictions. It is widely recognized that hydraulic tortuosity is typically approximated as a function that depends solely on bulk porosity, neglecting other variables like particle size or the shape of solid particles. This work examines the influence of porosity and particle size on fundamental parameters such as hydraulic tortuosity, normalized diffusion coefficient, and permeability. Two-dimensional digitally created porous media... (More)
The study of fluid transport in porous media is crucial for many applications in science and engineering. From a modeling perspective, understanding how diffusion parameters behave when microstructural variations are taken into account is a significant step toward achieving more detailed and accurate model predictions. It is widely recognized that hydraulic tortuosity is typically approximated as a function that depends solely on bulk porosity, neglecting other variables like particle size or the shape of solid particles. This work examines the influence of porosity and particle size on fundamental parameters such as hydraulic tortuosity, normalized diffusion coefficient, and permeability. Two-dimensional digitally created porous media have been utilized to assess these parameters, and the Lattice Boltzmann method (LBM) has been employed to compute the velocity field within the pore material. In-house code has been developed, with the input variables being the bulk porosity of the media and particle size.
For each bulk porosity, fifty samples were evaluated, with ten samples considered for every particle size. Ultimately, one hundred and fifty samples were included in this study. The results showed significant trends related to the morphological microstructure of the porous media. In particular, as anticipated, tortuosity and permeability are influenced by particle size and porosity. The novelty of this study lies in the proposed correlations among the different variables, which will assist in predicting diffusion parameters more accurately. Results are compared with previous theoretical and empirical models, highlighting both the advantages and limitations of the LBM approximation.
(Less)
- author
- Espinoza-Andaluz, Mayken
LU
; Ordoñez-Saca, Brayan
; Santana-Villamar, Jordy
; Vallejo-Cervantes, Carlos
and Andersson, Martin
LU
- organization
- publishing date
- 2025
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Diffusion parameters, Lattice Boltzmann method, Porous media
- host publication
- Proceedings of ASME 2025 International Mechanical Engineering Congress and Exposition (IMECE2025) : November 16–20, 2025 Memphis, Tennessee, USA - November 16–20, 2025 Memphis, Tennessee, USA
- series title
- ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
- volume
- 7
- article number
- V007T11A031
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME 2025 International Mechanical Engineering Congress and Exposition, IMECE 2025
- conference location
- Memphis, United States
- conference dates
- 2025-11-16 - 2025-11-20
- external identifiers
-
- scopus:105036023691
- ISBN
- 978-0-7918-8938-1
- DOI
- 10.1115/IMECE2025-165299
- language
- English
- LU publication?
- yes
- id
- ae20638c-c060-412f-97db-234b95cfe72e
- date added to LUP
- 2026-04-30 17:07:16
- date last changed
- 2026-06-02 09:58:55
@inproceedings{ae20638c-c060-412f-97db-234b95cfe72e,
abstract = {{<p>The study of fluid transport in porous media is crucial for many applications in science and engineering. From a modeling perspective, understanding how diffusion parameters behave when microstructural variations are taken into account is a significant step toward achieving more detailed and accurate model predictions. It is widely recognized that hydraulic tortuosity is typically approximated as a function that depends solely on bulk porosity, neglecting other variables like particle size or the shape of solid particles. This work examines the influence of porosity and particle size on fundamental parameters such as hydraulic tortuosity, normalized diffusion coefficient, and permeability. Two-dimensional digitally created porous media have been utilized to assess these parameters, and the Lattice Boltzmann method (LBM) has been employed to compute the velocity field within the pore material. In-house code has been developed, with the input variables being the bulk porosity of the media and particle size. </p><p>For each bulk porosity, fifty samples were evaluated, with ten samples considered for every particle size. Ultimately, one hundred and fifty samples were included in this study. The results showed significant trends related to the morphological microstructure of the porous media. In particular, as anticipated, tortuosity and permeability are influenced by particle size and porosity. The novelty of this study lies in the proposed correlations among the different variables, which will assist in predicting diffusion parameters more accurately. Results are compared with previous theoretical and empirical models, highlighting both the advantages and limitations of the LBM approximation.</p>}},
author = {{Espinoza-Andaluz, Mayken and Ordoñez-Saca, Brayan and Santana-Villamar, Jordy and Vallejo-Cervantes, Carlos and Andersson, Martin}},
booktitle = {{Proceedings of ASME 2025 International Mechanical Engineering Congress and Exposition (IMECE2025) : November 16–20, 2025 Memphis, Tennessee, USA}},
isbn = {{978-0-7918-8938-1}},
keywords = {{Diffusion parameters; Lattice Boltzmann method; Porous media}},
language = {{eng}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)}},
title = {{Impact of porosity and particle size on diffusion in porous media : a 2d Lattice Boltzmann approach}},
url = {{http://dx.doi.org/10.1115/IMECE2025-165299}},
doi = {{10.1115/IMECE2025-165299}},
volume = {{7}},
year = {{2025}},
}