Energy Decaying Phase-Field Model for Fluid-Particle Interaction in Two-Phase Flow

2020 ◽  
Vol 80 (1) ◽  
pp. 572-598
Author(s):  
Xiang Li ◽  
Qiang Du ◽  
Xiao-Ping Wang
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Two Phase Flow ◽  
Particle Interaction ◽  
Phase Field Model ◽  
Fluid Particle ◽  
Phase Flow ◽  
Two Phase

scholarly journals Preferential Paths of Air-water Two-phase Flow in Porous Structures with Special Consideration of Channel Thickness Effects

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jinhui Liu ◽  
Yang Ju ◽  
Yingqi Zhang ◽  
Wenbo Gong
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Two Phase Flow ◽  
Phase Field Model ◽  
Path Selection ◽  
Phase Flow ◽  
Porous Structures ◽  
Two Phase ◽  
Flow Paths ◽  
Channel Thickness

Abstract Accurate understanding and predicting the flow paths of immiscible two-phase flow in rocky porous structures are of critical importance for the evaluation of oil or gas recovery and prediction of rock slides caused by gas-liquid flow. A 2D phase field model was established for compressible air-water two-phase flow in heterogenous porous structures. The dynamic characteristics of air-water two-phase interface and preferential paths in porous structures were simulated. The factors affecting the path selection of two-phase flow in porous structures were analyzed. Transparent physical models of complex porous structures were prepared using 3D printing technology. Tracer dye was used to visually observe the flow characteristics and path selection in air-water two-phase displacement experiments. The experimental observations agree with the numerical results used to validate the accuracy of phase field model. The effects of channel thickness on the air-water two-phase flow behavior and paths in porous structures were also analyzed. The results indicate that thick channels can induce secondary air flow paths due to the increase in flow resistance; consequently, the flow distribution is different from that in narrow channels. This study provides a new reference for quantitatively analyzing multi-phase flow and predicting the preferential paths of immiscible fluids in porous structures.

A phase-field model of two-phase Hele-Shaw flow

2014 ◽  
Vol 758 ◽  
pp. 522-552 ◽  
Author(s):  
Luis Cueto-Felgueroso ◽  
Ruben Juanes
Keyword(s):  
Phase Field ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Phase Field Model ◽  
Phase Segregation ◽  
Phase Flow ◽  
Fractional Flow ◽  
Two Phase ◽  
Fluid Saturation ◽  
The Impact

AbstractWe propose a continuum model of two-phase flow in a Hele-Shaw cell. The model describes the multiphase three-dimensional flow in the cell gap using gap-averaged quantities such as fluid saturation and Darcy flux. Viscous and capillary coupling between the fluids in the gap leads to a nonlinear fractional flow function. Capillarity and wetting phenomena are modelled within a phase-field framework, designing a heuristic free energy functional that induces phase segregation at equilibrium. We test the model through the simulation of bubbles and viscously unstable displacements (viscous fingering). We analyse the model’s rich behaviour as a function of capillary number, viscosity contrast and cell geometry. Including the effect of wetting films on the two-phase flow dynamics opens the door to exploring, with a simple two-dimensional model, the impact of wetting and flow rate on the performance of microfluidic devices and geological flows through fractures.

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