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Phase diagram for preferential flow in dual permeable media

Published online by Cambridge University Press:  08 September 2022

Fanli Liu  and
Moran Wang Open the ORCID record for Moran Wang [Opens in a new window]
Fanli Liu
Affiliation:
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, PR China
Moran Wang*
Affiliation:
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, PR China
*
†Email address for correspondence: mrwang@tsinghua.edu.cn
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Abstract

We study the preference of two-phase displacements systematically by theoretical derivations and numerical simulations via a non-uniform pore doublet model. All the most important impact factors, including viscosity ratio, capillary number, wetting conditions and boundary conditions, have been considered, and finally a complete phase diagram for preferential flow has been obtained. The simple treatment for the dual-permeability media has been validated, and further, with a few necessary corrections the phase diagram is applicable for disordered permeable media in general. These results help us to understand the occurrence and manipulation of preferential flow in heterogeneous permeable media.

JFM classification

Low-Reynolds-number flows: Porous media

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Type
JFM Papers
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Journal of Fluid Mechanics , Volume 948 , 10 October 2022 , A19
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Copyright
© Tsinghua University, 2022. Published by Cambridge University Press

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References

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