Interpretation of velocity enhancement in polymer transport through

1 Interpretation of velocity enhancement in polymer transport through porous media 

Many observations have confirmed that, when there is no adsorption/retention or when the porous medium polymer adsorption level is fully satisfied, polymer molecules are transported through the porous medium faster than those of inert tracer species (Dawson and Lantz, 1972 Willhite and Dominguez, 1977 Chauveteau, 1982). This phenomenon was originally reported in the oil literature by Dawson and Lantz (1972), who called it 

When velocity enhancements effects are observed in polymer flow through 

2 Underlying assumptions in the formulation of the transport equation in the presence of inaccessible/excluded pore volume effects 

It was noted above that the mathematical formulation of the transport equation in the presence of IPV/surface exclusion for polymer was represented by the extended Equation 7.3 which included the factor /. However, this model is not rigorous, and its assumptions have been investigated within different models by various authors (Alishaeva and Entov, 1984 Gilman and MacMillan, 1985). Here the problem of deriving a consistent macroscopic transport equation in the presence of IPV/surface exclusion effects and 

---