Abstract
A model of flowing solutions that takes into account the structure, orientation, and mechanism of action of drag reducers is analyzed. A theoretical analysis of conformational states is provided. Computer calculations for model chains show the effects of varying solvent quality, polymer concentration, and free volume in the system. The results of the computer work provide clear criteria for choosing drag reducers with high efficacy λ. The model is represented by equations in terms of the parameters that determine drag reduction. Calculations performed for a variety of DR agents in aqueous solutions show that the predicted λ(t) values agree with the measured ones
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