Foam Transport in Porous Media - A Review Page: 14 of 76
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a surface tension or interfacial tension
aO surface tension without surfactant
interfacial area increased coefficient
geometrical factor
r maximum surface excess concentration
js the amount of surfactant adsorption on porous media surfaces
Vp0 a model parameter
AP"max maximum pressure drop
Subscripts
Y any phase
w aqueous phase
nw nonaqueous phase
g gas phase
f foam
o oil
t total or trapped
ff flowing foam
ft foam trappedxii
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Zhang, Z. F.; Freedman, Vicky L. & Zhong, Lirong. Foam Transport in Porous Media - A Review, report, November 11, 2009; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc841157/m1/14/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.