Relative permeability/saturation relationships, wettability effects

Wettability Effects on Relative Permeability/Saturation Relationships... 

Mafiiematical models of DNAPL subsurface movement require capillary pressure/saturation and relative permeability/saturation constitutive relationships for DNAPL/water/soil systems. Wettability alterations may have a considerable effect on ciqiillary pressure/saturation relationships as discussed in the previous section. They may also have an intact on relative permeability/saturation relationships yet this has received less attention in file literature in large part due to file experimental difficulties associated with measuring these relationships. 

Bau and Torrance [128] use a different relative permeability-saturation relation and arrive at a slightly different relation. Jones et al. [129] use a similar treatment and find a relationship for qc, that gives values lower than those predicted by Eq. 9.130 by a factor of approximately 2. It should be noted that these predictions of qCI are estimations and that the effects of wettability, solid matrix structure (all of these studies consider spherical particles only), and surface tension (all of which influence the phase distributions) are included only through the... 

Predictive models based on the capillary pressure/saturation relationships are commonly used to estimate relative permeability in the absence of experimental data 37, 38). One such predictive model, that of Bradford et al. 37), is used in Figure 6 to illustrate the effects of varying wettability on relative... 

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