Numerical simulations of turbulent channel flows, with or without additives, are limited in the extent of the Reynolds number (Re) and Deborah number (De). The comparison of such simulations to theories of drag reduction, which are usually derived for asymptotically high Re and De, calls for some care. In this paper we present a study of drag reduction by rodlike polymers in a turbulent channel flow using direct numerical simulation and illustrate how these numerical results should be related to the recently developed theory.

Benzi, R., Ching, E., De Angelis, E., Procaccia, I. (2008). Comparison of theory and direct numerical simulations of drag reduction by rodlike polymers in turbulent channel flows. PHYSICAL REVIEW E, 77(4) [10.1103/PhysRevE.77.046309].

Comparison of theory and direct numerical simulations of drag reduction by rodlike polymers in turbulent channel flows

BENZI, ROBERTO;
2008-01-01

Abstract

Numerical simulations of turbulent channel flows, with or without additives, are limited in the extent of the Reynolds number (Re) and Deborah number (De). The comparison of such simulations to theories of drag reduction, which are usually derived for asymptotically high Re and De, calls for some care. In this paper we present a study of drag reduction by rodlike polymers in a turbulent channel flow using direct numerical simulation and illustrate how these numerical results should be related to the recently developed theory.
2008
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Con Impact Factor ISI
Channel flow; Computer simulation; Organic polymers; Reynolds number; Turbulent flow; Deborah number (De); Rodlike polymers; Drag reduction
Benzi, R., Ching, E., De Angelis, E., Procaccia, I. (2008). Comparison of theory and direct numerical simulations of drag reduction by rodlike polymers in turbulent channel flows. PHYSICAL REVIEW E, 77(4) [10.1103/PhysRevE.77.046309].
Benzi, R; Ching, E; De Angelis, E; Procaccia, I
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/30940
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