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Impact of Synthetic Porous Medium Geometric Properties on Solute Transport Using Direct 3D Pore-Scale Simulations
- Source :
- Geofluids, 11 (6), Geofluids, Vol 2019 (2019), Geofluids (Oxford. Online) 2019 (2019). doi:10.1155/2019/6810467, info:cnr-pdr/source/autori:Paolo Roberto Di Palma, Nicolas Guyennon, Andrea Parmigiani, Christian Huber, Falk He?e, and Emanuele Romano/titolo:Impact of Synthetic Porous Medium Geometric Properties on Solute Transport Using Direct 3D Pore-Scale Simulations/doi:10.1155%2F2019%2F6810467/rivista:Geofluids (Oxford. Online)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:2019
- Publication Year :
- 2019
- Publisher :
- Hindawi Limited, 2019.
-
Abstract
- Transport processes in porous media have been traditionally studied through the parameterization of macroscale properties, by means of volume-averaging or upscaling methods over a representative elementary volume. The possibility of upscaling results from pore-scale simulations, to obtain volume-averaging properties useful for practical purpose, can enhance the understanding of transport effects that manifest at larger scales. Several studies have been carried out to investigate the impact of the geometric properties of porous media on transport processes for solute species. However, the range of pore-scale geometric properties, which can be investigated, is usually limited to the number of samples acquired from microcomputed tomography images of real porous media. The present study takes advantage of synthetic porous medium generation to propose a systematic analysis of the relationships between geometric features of the porous media and transport processes through direct simulations of fluid flow and advection-diffusion of a non-reactive solute. Numerical simulations are performed with the lattice Boltzmann method on synthetic media generated with a geostatistically based approach. Our findings suggest that the advective transport is primarily affected by the specific surface area and the mean curvature of the porous medium, while the effective diffusion coefficient scales as the inverse of the tortuosity squared. Finally, the possibility of estimating the hydrodynamic dispersion coefficient knowing only the geometric properties of porous media and the applied pressure gradient has been tested, within the range of tested porous media, against advection-diffusion simulations at low Reynolds (<br />Geofluids, 11 (6)<br />ISSN:1468-8115<br />ISSN:1468-8123
- Subjects :
- Materials science
Mean curvature
Article Subject
geometric features
010504 meteorology & atmospheric sciences
Advection
lcsh:QE1-996.5
0208 environmental biotechnology
Lattice Boltzmann methods
pore-scale simulation
02 engineering and technology
Mechanics
01 natural sciences
Tortuosity
020801 environmental engineering
transport modeling
lcsh:Geology
Fluid dynamics
Representative elementary volume
General Earth and Planetary Sciences
Porous medium
Pressure gradient
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 14688123 and 14688115
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- Geofluids
- Accession number :
- edsair.doi.dedup.....14d22755f1733831c561a63057754bbc