Interface pinning of immiscible gravity-exchange flows in porous media
We study the gravity-exchange flow of two immiscible fluids in a porous medium and show that, in contrast with the miscible case, a portion of the initial interface remains pinned at all times. We elucidate, by means of micromodel experiments, the pore-level mechanism responsible for capillary pinni...
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| Veröffentlicht in: | Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2013-02, Vol.87 (2), p.023015-023015, Article 023015 |
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| container_title | Physical review. E, Statistical, nonlinear, and soft matter physics |
| container_volume | 87 |
| creator | Zhao, Benzhong MacMinn, Christopher W Szulczewski, Michael L Neufeld, Jerome A Huppert, Herbert E Juanes, Ruben |
| description | We study the gravity-exchange flow of two immiscible fluids in a porous medium and show that, in contrast with the miscible case, a portion of the initial interface remains pinned at all times. We elucidate, by means of micromodel experiments, the pore-level mechanism responsible for capillary pinning at the macroscale. We propose a sharp-interface gravity-current model that incorporates capillarity and quantitatively explains the experimental observations, including the x~t(1/2) spreading behavior at intermediate times and the fact that capillarity stops a finite-release current. Our theory and experiments suggest that capillary pinning is potentially an important, yet unexplored, trapping mechanism during CO(2) sequestration in deep saline aquifers. |
| doi_str_mv | 10.1103/PhysRevE.87.023015 |
| format | Article |
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We elucidate, by means of micromodel experiments, the pore-level mechanism responsible for capillary pinning at the macroscale. We propose a sharp-interface gravity-current model that incorporates capillarity and quantitatively explains the experimental observations, including the x~t(1/2) spreading behavior at intermediate times and the fact that capillarity stops a finite-release current. 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E, Statistical, nonlinear, and soft matter physics</jtitle><addtitle>Phys Rev E Stat Nonlin Soft Matter Phys</addtitle><date>2013-02-19</date><risdate>2013</risdate><volume>87</volume><issue>2</issue><spage>023015</spage><epage>023015</epage><pages>023015-023015</pages><artnum>023015</artnum><issn>1539-3755</issn><eissn>1550-2376</eissn><abstract>We study the gravity-exchange flow of two immiscible fluids in a porous medium and show that, in contrast with the miscible case, a portion of the initial interface remains pinned at all times. We elucidate, by means of micromodel experiments, the pore-level mechanism responsible for capillary pinning at the macroscale. We propose a sharp-interface gravity-current model that incorporates capillarity and quantitatively explains the experimental observations, including the x~t(1/2) spreading behavior at intermediate times and the fact that capillarity stops a finite-release current. 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| ispartof | Physical review. E, Statistical, nonlinear, and soft matter physics, 2013-02, Vol.87 (2), p.023015-023015, Article 023015 |
| issn | 1539-3755 1550-2376 |
| language | eng |
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| source | MEDLINE; American Physical Society |
| subjects | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Computer Simulation GEOSCIENCES Models, Chemical Porosity Rheology - methods Solutions - chemistry Surface Properties |
| title | Interface pinning of immiscible gravity-exchange flows in porous media |
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