Turbulent drag reduction by flexible and rodlike polymers: Crossover effects at small concentrations
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AbstractDrag reduction by polymers is bounded between two universal asymptotes, the von Karman log law of the law and the maximum drag reduction (MDR) asymptote. It is theoretically understood why the MDR asymptote is universal, independent of whether the polymers are flexible or rodlike. The crossover behavior from the Newtonian von Karman log law to the MDR is, however, not universal, showing different characteristics for flexible and rodlike polymers. In this paper we provide a theory for this crossover phenomenology.
All Author(s) ListChing ESC, Lo TS, Procaccia I
Journal namePhysical Review E
Volume Number74
Issue Number2
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesPhysics; Physics, Fluids & Plasmas; PHYSICS, FLUIDS & PLASMAS; Physics, Mathematical; PHYSICS, MATHEMATICAL

Last updated on 2020-16-09 at 00:44