White-light and speckle-correlation analysis of imbibition in porous media: critical properties of near-pinned interfaces

Dmitry A. Zimnyakov; Anton V. Sadovoy; Maxim A. Vilensky

doi:10.1117/12.796998

22 April 2008 White-light and speckle-correlation analysis of imbibition in porous media: critical properties of near-pinned interfaces

Dmitry A. Zimnyakov, Anton V. Sadovoy, Maxim A. Vilensky

Author Affiliations +

Proceedings Volume 7008, Eighth International Conference on Correlation Optics; 70080T (2008) https://doi.org/10.1117/12.796998
Event: Eighth International Conference on Correlation Optics, 2007, Chernivsti, Ukraine

Abstract

Analysis of images of moving liquid-gas boundaries in porous samples (sheets of paper) under white light and coherent illumination was used to study the scaling properties of growing interfaces near the pinning condition. The obtained images were digitized and processed in order to obtain the local and global parameters of interface mobility at different stages of interface growth. At early stage of growth, the interface dynamics is characterized by the familiar Lucas-Washburn (LW) equation, which describes continuous-like motion of interface. At the late stage of growth, near the pinning condition, the interface motion exhibits the deviation from LW model, which is the result of pronounced discrete character of interface evolution. The developed technique of imbibition analysis can be applied to structural study of porous media of various nature.

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Dmitry A. Zimnyakov, Anton V. Sadovoy, and Maxim A. Vilensky "White-light and speckle-correlation analysis of imbibition in porous media: critical properties of near-pinned interfaces", Proc. SPIE 7008, Eighth International Conference on Correlation Optics, 70080T (22 April 2008); https://doi.org/10.1117/12.796998

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