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Microfluidics of imbibition in random porous media

H. S. Wiklund* and T. Uesaka†

  • Fibre Science and Communication Network, Mid Sweden University, Holmgatan 10, SE-851 70 Sundsvall, Sweden

  • *hanna.wiklund@miun.se
  • †tetsu.uesaka@miun.se
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Phys. Rev. E 87, 023006 – Published 13 February, 2013

DOI: https://doi.org/10.1103/PhysRevE.87.023006

Abstract

A free-energy lattice Boltzmann approach has been used to perform simulations of liquid penetration into random porous media. We focus our study on the effects of microstructures, particularly microtopography, on liquid penetration driven by capillary force and external pressure. For this purpose we set up a model structure that consists of a network of interconnected capillaries with varying pore geometries. The results showed that the discontinuities in the solid-surface curvature, as are present as corners on the capillary surfaces, have strong influences on liquid penetration through their pinning effects and interactions with local geometry.

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Phys. Rev. E 87, 023006– Published 13 February, 2013
  • Received 3 June 2012

©2013 American Physical Society

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