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Observation of Large-Scale Structures in Unsaturated Materials

  • J. E. Maneval (a1), M.J. Mccarthy (a2) and S. Whitaker (a1)

Abstract

We report here the use of nuclear magnetic resonance imaging in the observation of liquid-phase fraction distributions in a partially-wetted sample of glass beads. By combiningboth large- and small-scale imaging techniques, we can study the transition from local-averaged saturations to large-scale averaged saturations. The image data allows us to assess the utility of the large-scale measurements We comment on the reliability and generality of the measurements for our specific system.

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1. Whitaker, S., in Advances in Heat Transfer, edited by Hartnett, T. (Academic Press, New York, 1977), pp. 119203.
2. Morris, P.G., NMR Imaging in Medicine and Biology, (Oxford, 1986).
3. Baveye, P. and Sposito, G., Water Resouces Research, 20, 521 (1984).
4. Maneval, J.E., McCarthy, M.J. and Whitaker, S., accepted for publication, Water Res. Res, (1990).
5. Quintard, M and Whitaker, S., J. Theoret. Appl. Mech., 61, 691, (1987); Trans. Por. Media, a, 357, (1988).
6. Berryman, J., J. Appl. Phys., 60, 1930, (1986); J. Appl. Phys., 62, 2221, (1987).

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Observation of Large-Scale Structures in Unsaturated Materials

  • J. E. Maneval (a1), M.J. Mccarthy (a2) and S. Whitaker (a1)

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