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On the effect of flow regime and pore structure on the flow signatures in porous media
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Vasheghani Farahani, Mehrdad and Mousavi Nezhad, Mohaddeseh (2022) On the effect of flow regime and pore structure on the flow signatures in porous media. Physics of Fluids, 34 (11). 115139 . doi:10.1063/5.0120201 ISSN 1070-6631.
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WRAP-On-effect-flow-regime-pore-structure-flow-signatures-porous-media-22.pdf - Accepted Version - Requires a PDF viewer. Download (3620Kb) | Preview |
Official URL: https://doi.org/10.1063/5.0120201
Abstract
In this study, lattice Boltzmann method (LBM) is utilized for three-dimensional simulation of fluid flow through two porous structures, consisting of grains with the same diameter: (i) a homogeneous porous domain, in which the grains are placed with a simple cubic packing configuration, and (ii) a randomly packed porous domain. An ultra-fine mesh size is considered to perform the simulations in three orders of magnitude of Reynolds number (Re), covering laminar to turbulent flow regimes, and capture different flow signatures. Pore velocity fields are derived, and their sample probability density functions (PDF) are analyzed vs time to investigate the dynamics of the flow. The analysis of the PDFs clearly shows that stagnant zones play a significant role in the formation of the pore flow fields, manifested by multimodal PDFs, and the distribution of the velocities in porous media at various Re cannot be characterized by a single PDF model regardless of the pore structure. While the velocities at the stagnant regions and in the vicinity of the solid boundaries are primarily affected by the viscous forces and exhibit a power-law PDF at different Re, the velocities in the main (preferential) flow pathways away from the boundaries are shown to be influenced by the inertial forces, hence having an exponential PDF when Re is low. At high Re, however, depending on the tortuosity of the porous structure, the velocities may exhibit an exponential or even Laplace PDF.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > Q Science (General) Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||
| Library of Congress Subject Headings (LCSH): | Fluid dynamics -- Mathematical models, Porous materials -- Fluid dynamics -- Mathematical models, Lattice Boltzmann methods, Probabilities | |||||||||
| Journal or Publication Title: | Physics of Fluids | |||||||||
| Publisher: | American Institute of Physics | |||||||||
| ISSN: | 1070-6631 | |||||||||
| Official Date: | 11 November 2022 | |||||||||
| Dates: |
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| Volume: | 34 | |||||||||
| Number: | 11 | |||||||||
| Article Number: | 115139 | |||||||||
| DOI: | 10.1063/5.0120201 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Mehrdad Vasheghani Farahani and Mohaddeseh Mousavi Nezhad , "On the effect of flow regime and pore structure on the flow signatures in porous media", Physics of Fluids 34, 115139 (2022) and may be found at https://doi.org/10.1063/5.0120201 | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Copyright Holders: | © 2022 Author(s). Published under an exclusive license by AIP Publishing. | |||||||||
| Description: | Open Access under an exclusive license by AIP Publishing |
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| Date of first compliant deposit: | 16 November 2022 | |||||||||
| Date of first compliant Open Access: | 16 November 2022 | |||||||||
| RIOXX Funder/Project Grant: |
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