Transport in Porous Media

, Volume 101, Issue 2, pp 191–213 | Cite as

Numerical Modelling of Sub-pore Scale Events in Two-Phase Flow Through Porous Media

  • Ali Q. Raeini
  • Branko Bijeljic
  • Martin J. Blunt
Article
First Online:
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Accepted:

Abstract

We use a new volume-of-fluid based finite-volume method to model two-phase flow through simple pore geometries and study the mechanisms controlling two-phase flow at the pore scale. The numerical model is used to study layer flow and snap-off, and investigate the effect of geometry and flow rate on trapping and mobilization of the disconnected ganglia. Furthermore, a new variable, the capillary field, is introduced to characterize the capillary force under dynamic situations, and a force-balance concept is presented to relate flow rates to pore-scale forces—dynamic pressure gradient and the capillary field. This description of the flow has the potential to be used in pore-network models to study the effect of pore-scale structures on the flow at larger scales. As an illustration of the applicability of this concept, we use the relations obtained from the numerical simulations to predict the threshold capillary number for blob mobilization during imbibition and show that this information can be used to reproduce the direct numerical simulation results accurately.

Keywords

Pore-scale modelling Capillary field Snap-off  Layer flow  Capillary trapping 
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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Ali Q. Raeini
    • 1
  • Branko Bijeljic
    • 1
  • Martin J. Blunt
    • 1
  1. 1.Imperial College LondonLondonUK

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