Pore geometry effect on the electrical properties of porous media by a modified capillary model

2018 ◽  
Author(s):  
Haitao Wang ◽  
Jinyan Zhang
Keyword(s):  
Porous Media ◽  
Electrical Properties ◽  
Pore Geometry ◽  
Capillary Model ◽  
Geometry Effect

scholarly journals A Fractal Model for Predicting the Relative Permeability of Rough-Walled Fractures

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Zuyang Ye ◽  
Wang Luo ◽  
Shibing Huang ◽  
Yuting Chen ◽  
Aiping Cheng
Keyword(s):  
Porous Media ◽  
Multiphase Flow ◽  
Relative Permeability ◽  
Fractal Model ◽  
Numerical Results ◽  
Flow Paths ◽  
Capillary Model ◽  
Lognormal Distributions ◽  
Fractal Characteristics ◽  
Aperture Distribution

The relative permeability and saturation relationships through fractures are fundamental for modeling multiphase flow in underground geological fractured formations. In contrast to the traditional straight capillary model from porous media, the realistic flow paths in rough-walled fractures are tortuous. In this study, a fractal relationship between relative permeability and saturation of rough-walled fractures is proposed associated with the fractal characteristics of tortuous parallel capillary plates, which can be generalized to several existing models. Based on the consideration that the aperture distribution of rough-walled fracture can be represented by Gaussian and lognormal distributions, aperture-based expressions between relative permeability and saturation are explicitly derived. The developed relationships are validated by the experimental observations on Gaussian distributed fractures and numerical results on lognormal distributed fractures, respectively.

scholarly journals Effects of Pore Geometry on Flowing Foam Dynamics in 3D-Printed Porous Media

2018 ◽  
Vol 124 (3) ◽  
pp. 903-917 ◽  
Author(s):  
Kofi Osei-Bonsu ◽  
Paul Grassia ◽  
Nima Shokri
Keyword(s):  
Porous Media ◽  
Pore Geometry ◽  
3D Printed

Numerical study of the effect of pore geometry on non-wetting phase trapping in porous media

2013 ◽  
Author(s):  
N. Zhou ◽  
J. Yang ◽  
K. Takehana ◽  
T. Suekane ◽  
Q. W. Wang
Keyword(s):  
Porous Media ◽  
Numerical Study ◽  
Pore Geometry

scholarly journals Localization in Flow of Non-Newtonian Fluids Through Disordered Porous Media

2021 ◽  
Vol 9 ◽  
Author(s):  
H. J. Seybold ◽  
U. Eberhard ◽  
E. Secchi ◽  
R. L. C. Cisne ◽  
J. Jiménez-Martínez ◽  
...  
Keyword(s):  
Porous Media ◽  
Spatial Distribution ◽  
Pore Space ◽  
Pore Geometry ◽  
Flow Conditions ◽  
Flow Localization ◽  
Chemical Reactors ◽  
Nonlinear Rheology ◽  
Constitutive Properties ◽  
Disordered Porous Media

We combine results of high-resolution microfluidic experiments with extensive numerical simulations to show how the flow patterns inside a “swiss-cheese” type of pore geometry can be systematically controlled through the intrinsic rheological properties of the fluid. Precisely, our analysis reveals that the velocity field in the interstitial pore space tends to display enhanced channeling under certain flow conditions. This observed flow “localization”, quantified by the spatial distribution of kinetic energy, can then be explained in terms of the strong interplay between the disordered geometry of the pore space and the nonlinear rheology of the fluid. Our results disclose the possibility that the constitutive properties of the fluid can enhance the performance of chemical reactors and chromatographic devices through control of the channeling patterns inside disordered porous media.

A General Macroscopic Model for Turbulent Flow in Porous Media

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Nima F. Jouybari ◽  
Mehdi Maerefat ◽  
T. Staffan Lundström ◽  
Majid E. Nimvari ◽  
Zahra Gholami
Keyword(s):  
Porous Media ◽  
Turbulent Flow ◽  
Present Model ◽  
Flow Characteristics ◽  
Flow In Porous Media ◽  
Macroscopic Model ◽  
Solid Matrix ◽  
Turbulent Regime ◽  
Rod Bundles ◽  
Capillary Model

The present study deals with the generalization of a macroscopic turbulence model in porous media using a capillary model. The additional source terms associated with the production and dissipation of turbulent kinetic energy due to the presence of solid matrix are calculated using the capillary model. The present model does not require any prior pore scale simulation of turbulent flow in a specific porous geometry in order to close the macroscopic turbulence equations. Validation of the results in packed beds, periodic arrangement of square cylinders, synthetic foams, and longitudinal flows such as pipes, channels, and rod bundles against available data in the literature reveals the ability of the present model in predicting turbulent flow characteristics in different types of porous media. Transition to the fully turbulent regime in porous media and different approaches to treat this phenomenon are also discussed in the present study. Finally, the general model is modified so that it can be applied to lower Reynolds numbers below the range of fully turbulent regime in porous media.

scholarly journals Drying and Wetting Processes in Porous Media with a Macropore and Capillary Model.

1996 ◽  
Vol 62 (596) ◽  
pp. 1475-1481
Author(s):  
Yoshihisa FUJII ◽  
Ken-ichiro TSUYUKI ◽  
Kunio HIJIKATA
Keyword(s):  
Porous Media ◽  
Capillary Model
Sign in / Sign up

Export Citation Format

Share Document