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Modeling Subsurface Petroleum Hydrocarbon Transport

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Irregular Water/NAPL/Air Distribution Copyright 1988 CRC Press

This photo shows another three phase distribution of water/NAPL and air. The fluid distribution is anything but regular. There appears to be a thin film of NAPL in some places, while at others thicker films coat the water layer. Water/NAPL Distribution Copyright 1988 CRC Press
There is an important contrast between the NAPL distributions in two- and three-phase systems. The residual NAPL saturation in a two-phase system is usually higher than that in a three-phase system. The simple reason is that in a three-phase system the air and NAPL must "share" the largest fraction of the pore space, while in a two-phase system the NAPL alone occupies the largest fraction of the pore space.

The color photographs on this page are reprinted with permission from Dense Chlorinated Solvents, Friedrich Schwille, Translated by James F. Pankow, 1988, Copyright CRC Press, Boca Raton, Florida c 1988

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