Drag reduction by polymers in turbulent wall-bounded flows exhibits universal and non-universal aspects. The universal maximal moan-velocity profile was explained in a recent theory. The saturation of this profile and the crossover back to the Newtonian plug are non-universal, depending on Reynolds number Re, concentration of polymer cp and the degree of polymerization N p. We explain the mechanism of saturation stemming from the finiteness of extensibility of the polymers, predict its dependence on c p and N in the limit of small cp and large Re, and present the excellent comparison of our predictions to experiments on drag reduction by DNA.
Benzi, R., L'vov, V.S., Procaccia, I., & Tiberkevich, V. (2004). Saturation of turbulent drag reduction in dilute polymer solutions. EUROPHYSICS LETTERS, 68(6), 825-831.
Tipologia: | Articolo su rivista | |
Citazione: | Benzi, R., L'vov, V.S., Procaccia, I., & Tiberkevich, V. (2004). Saturation of turbulent drag reduction in dilute polymer solutions. EUROPHYSICS LETTERS, 68(6), 825-831. | |
IF: | Con Impact Factor ISI | |
Lingua: | English | |
Settore Scientifico Disciplinare: | Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici | |
Revisione (peer review): | Sì, ma tipo non specificato | |
Tipo: | Articolo | |
Rilevanza: | Rilevanza internazionale | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1209/epl/i2004-10282-6 | |
Stato di pubblicazione: | Pubblicato | |
Data di pubblicazione: | 2004 | |
Titolo: | Saturation of turbulent drag reduction in dilute polymer solutions | |
Autori: | ||
Autori: | Benzi, R; L'vov, VS; Procaccia, I; Tiberkevich, V | |
Appare nelle tipologie: | 01 - Articolo su rivista |