A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated, and analyzed. The qualitative phase diagram of drag coefficient versus Reynolds number (Re) is recaptured in this model, including the theoretically elusive onset of drag reduction and the maximum drag reduction (MDR) asymptote. The Re-dependent drag and the MDR are analytically explained, and the dependence of the amount of drag on material parameters is rationalized.

Benzi, R., Ching, E., Horesh, N., Procaccia, I. (2004). Theory of concentration dependence in drag reduction by polymers and of the maximum drag reduction asymptote. PHYSICAL REVIEW LETTERS, 92(7), 783021-783024 [10.1103/PhysRevLett.92.078302].

Theory of concentration dependence in drag reduction by polymers and of the maximum drag reduction asymptote

BENZI, ROBERTO;
2004-01-01

Abstract

A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated, and analyzed. The qualitative phase diagram of drag coefficient versus Reynolds number (Re) is recaptured in this model, including the theoretically elusive onset of drag reduction and the maximum drag reduction (MDR) asymptote. The Re-dependent drag and the MDR are analytically explained, and the dependence of the amount of drag on material parameters is rationalized.
2004
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; Kinetic energy; Mathematical models; Navier Stokes equations; Nonlinear equations; Phase diagrams; Reynolds number; Tensors; Turbulence; Turbulent flow; Long-chain polymers; Maximum drag reduction (MDR) asymptote; Drag
Benzi, R., Ching, E., Horesh, N., Procaccia, I. (2004). Theory of concentration dependence in drag reduction by polymers and of the maximum drag reduction asymptote. PHYSICAL REVIEW LETTERS, 92(7), 783021-783024 [10.1103/PhysRevLett.92.078302].
Benzi, R; Ching, E; Horesh, N; Procaccia, I
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/32607
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