Modeling Subsurface Petroleum Hydrocarbon Transport
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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. 
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. |
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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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