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Dynamics of Air-Water Contact Lines and Interfaces Near the Pinning Threshold

Published online by Cambridge University Press:  10 February 2011

Po-Zen Wong ,
Erik Schäffer  and
David B. Pengra
Po-Zen Wong
Affiliation:
Department of Physics and Astronomy, University of Massachusetts, Amherst, MA 01003
Erik Schäffer
Affiliation:
Department of Physics and Astronomy, University of Massachusetts, Amherst, MA 01003
David B. Pengra
Affiliation:
Department of Physics and Astronomy, University of Massachusetts, Amherst, MA 01003
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Abstract

We report a study of the dynamics of capillary rise of water in glass tubes and glass bead packs. The water column height h is measured as a function of time t byvideo imaging. Analyzing the late time data in terms of critical pinning, dh/dt ∞ (P – Pc)β, we find an anomalously large exponent β for interfaces in bead packs and β ≈ 1 for contact lines in capillary tubes. Repetitive rise and fall experiments in capillary tubes suggests that thinning of the wetting film plays an important role in the dynamics. We discuss these findings in light of recent theories and experiments.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 464: Symposium FF – Dynamics in Small Confining Systems III , 1996 , 351
Copyright
Copyright © Materials Research Society 1997

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References

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