Imbibition in layered systems of packed beads

M. Reyssat, L. Y. Sangne, E. A. Van Nierop, H. A. Stone

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

We study imbibition of a wetting fluid into layers of packed beads and examine how variations of permeability in the flow direction affect the dynamics of imbibition. In the case of systems made of two distinct layers, we show that the imbibition dynamics exhibit three regimes including diffusive-like imbibition as well as an unusual constant speed imbibition, which can be fine-tuned by adjusting the bead diameters and the length of the initial layer. We also perform experiments with gradients of permeability by ordering layers of beads of increasing (or decreasing) sizes in a tube. A continuum description is used to explain the results from the discrete experimental systems. In all cases, analytical models based on Darcy's equation show excellent agreement with the experiments.

Original languageEnglish (US)
Article number56002
JournalEPL
Volume86
Issue number5
DOIs
StatePublished - Nov 27 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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