Abstract
AN earlier study of drag reduction by polyelectrolyte solutions1 revealed that the gross flow behaviour varied between extremes, termed types A and B, respectively characteristic of the collapsed and extended macromolecular conformations. Here I show, from examination of all available experiments1–5, that the crossover from type A to type B behaviour occurs at a characteristic conformation, which possibly reflects the role of macromolecular elasticity in the mechanism of drag reduction.
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VIRK, P. Conformational effects in drag reduction by polymers. Nature 262, 46–47 (1976). https://doi.org/10.1038/262046a0
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DOI: https://doi.org/10.1038/262046a0
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