Computation of the two-phase flow properties of intermediate-wet porous media: A pore network approach

2013 ◽  
Vol 92 (3) ◽  
pp. 515-523 ◽  
Author(s):  
Christos D. Tsakiroglou
Keyword(s):  
Porous Media ◽  
Two Phase Flow ◽  
Pore Network ◽  
Phase Flow ◽  
Network Approach ◽  
Flow Properties ◽  
Two Phase

scholarly journals Fluid Meniscus Algorithms for Dynamic Pore-Network Modeling of Immiscible Two-Phase Flow in Porous Media

2021 ◽  
Vol 8 ◽  
Author(s):  
Santanu Sinha ◽  
Magnus Aa. Gjennestad ◽  
Morten Vassvik ◽  
Alex Hansen
Keyword(s):  
Porous Media ◽  
Steady State ◽  
Two Phase Flow ◽  
Pore Network ◽  
Flow In Porous Media ◽  
Pore Network Model ◽  
Phase Flow ◽  
Steady State Flow ◽  
Two Phase ◽  
Dynamic Pore Network

We present in detail a set of algorithms for a dynamic pore-network model of immiscible two-phase flow in porous media to carry out fluid displacements in pores. The algorithms are universal for regular and irregular pore networks in two or three dimensions and can be applied to simulate both drainage displacements and steady-state flow. They execute the mixing of incoming fluids at the network nodes, then distribute them to the outgoing links and perform the coalescence of bubbles. Implementing these algorithms in a dynamic pore-network model, we reproduce some of the fundamental results of transient and steady-state two-phase flow in porous media. For drainage displacements, we show that the model can reproduce the flow patterns corresponding to viscous fingering, capillary fingering and stable displacement by varying the capillary number and viscosity ratio. For steady-state flow, we verify non-linear rheological properties and transition to linear Darcy behavior while increasing the flow rate. Finally we verify the relations between seepage velocities of two-phase flow in porous media considering both disordered regular networks and irregular networks reconstructed from real samples.

Non-equilibrium effects in capillarity and interfacial area in two-phase flow: dynamic pore-network modelling

2010 ◽  
Vol 655 ◽  
pp. 38-71 ◽  
Author(s):  
V. JOEKAR-NIASAR ◽  
S. M. HASSANIZADEH ◽  
H. K. DAHLE
Keyword(s):  
Porous Media ◽  
Capillary Pressure ◽  
Two Phase Flow ◽  
Interfacial Area ◽  
Pore Network ◽  
Flow In Porous Media ◽  
Phase Flow ◽  
Two Phase ◽  
Specific Interfacial Area ◽  
Non Equilibrium

Current macroscopic theories of two-phase flow in porous media are based on the extended Darcy's law and an algebraic relationship between capillary pressure and saturation. Both of these equations have been challenged in recent years, primarily based on theoretical works using a thermodynamic approach, which have led to new governing equations for two-phase flow in porous media. In these equations, new terms appear related to the fluid–fluid interfacial area and non-equilibrium capillarity effects. Although there has been a growing number of experimental works aimed at investigating the new equations, a full study of their significance has been difficult as some quantities are hard to measure and experiments are costly and time-consuming. In this regard, pore-scale computational tools can play a valuable role. In this paper, we develop a new dynamic pore-network simulator for two-phase flow in porous media, called DYPOSIT. Using this tool, we investigate macroscopic relationships among average capillary pressure, average phase pressures, saturation and specific interfacial area. We provide evidence that at macroscale, average capillary pressure–saturation–interfacial area points fall on a single surface regardless of flow conditions and fluid properties. We demonstrate that the traditional capillary pressure–saturation relationship is not valid under dynamic conditions, as predicted by the theory. Instead, one has to employ the non-equilibrium capillary theory, according to which the fluids pressure difference is a function of the time rate of saturation change. We study the behaviour of non-equilibrium capillarity coefficient, specific interfacial area, and its production rate versus saturation and viscosity ratio.A major feature of our pore-network model is a new computational algorithm, which considers capillary diffusion. Pressure field is calculated for each fluid separately, and saturation is computed in a semi-implicit way. This provides more numerical stability, compared with previous models, especially for unfavourable viscosity ratios and small capillary number values.

Experimental study of two-phase flow properties of CO2containing N2in porous media

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59360-59369 ◽  
Author(s):  
Bohao Wu ◽  
Lanlan Jiang ◽  
Yu Liu ◽  
Mingjun Yang ◽  
Dayong Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Porous Media ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Flow Properties ◽  
Two Phase

Measurements of Two-Phase Flow Properties of the Porous Media Used in PEM Fuel Cells

2019 ◽  
Vol 3 (1) ◽  
pp. 415-423 ◽  
Author(s):  
T. V. Nguyen ◽  
Guangyu Lin ◽  
Heebong Ohn ◽  
Dan Hussey ◽  
David Jacobson ◽  
...  
Keyword(s):  
Porous Media ◽  
Fuel Cells ◽  
Two Phase Flow ◽  
Pem Fuel Cells ◽  
Phase Flow ◽  
Flow Properties ◽  
Two Phase

scholarly journals Trapping and hysteresis in two-phase flow in porous media: A pore-network study

2013 ◽  
Vol 49 (7) ◽  
pp. 4244-4256 ◽  
Author(s):  
V. Joekar-Niasar ◽  
F. Doster ◽  
R. T. Armstrong ◽  
D. Wildenschild ◽  
M. A. Celia
Keyword(s):  
Porous Media ◽  
Two Phase Flow ◽  
Pore Network ◽  
Flow In Porous Media ◽  
Phase Flow ◽  
Two Phase
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