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Stability of a fluid-fluid interface in a biconical pore segment
Markus Hilpert1, Cass T Miller, William G Gray
1Department of Geography and Environmental Engineering, Johns Hopkins University, 313 Ames Hall, 3400 North Charles Street, Baltimore, MD 21218-2686, USA. markus_hilpert@jhu.edu
Journal of Colloid and Interface Science
|October 30, 2003
Summary
This study details fluid-fluid interface displacement in biconical pore segments, crucial for two-phase flow modeling. Analytical solutions reveal interface behavior and hysteresis, impacting drainage entry pressures.
Area of Science:
- Multiphase flow physics
- Pore-scale transport phenomena
Background:
- Biconical pore segments are common models for two-phase flow.
- Understanding fluid-fluid interface dynamics is key to accurately modeling flow in porous media.
Purpose of the Study:
- To provide a detailed description of fluid-fluid interface displacement within biconical pore segments.
- To develop analytical solutions for interface movement under varying capillary pressure or fluid volume.
- To investigate the role of interfacial and lineal tensions on contact angle and flow behavior.
Main Methods:
- Modeling fluid-fluid interface displacement in biconical pore segments with sharp edges.
- Analytical solutions derived for quasi-static displacement with zero lineal tension.
- Analysis of interfacial and lineal tensions effects on nonconstant contact angles.
Main Results:
- The common contact line slides in diverging/converging sections but remains pinned at the throat, inlet, and outlet.
- Observed hysteresis in fluid displacement within the pore segment.
- Drainage entry pressures deviate from previously reported values.
Conclusions:
- The study provides a fundamental understanding of fluid displacement in biconical pore geometries.
- The findings highlight the importance of considering contact line pinning and hysteresis for accurate two-phase flow simulations.
- Deviations in drainage entry pressures suggest limitations in existing models for these specific pore structures.