The drag reduction by polymers in turbulent flows was analyzed. The drag reduction, in a recent theory, was found to be consistent with the effective viscocity growing linearly with the distance from the wall. the reduction in the Reynolds stress overwhelmed the increase in the viscous drag by the self-consistent solution. By using the direct numerical simulations it was shown that a linear viscosity profile reduced the drag in agreement with the theory and in close correspondence with direct simulations of the FENE-P model at the same flow conditions.

Drag reduction by a linear velocity profile / DE ANGELIS, Elisabetta; Casciola, Carlo Massimo; L'Vov, V. S.; Pomyalov, A.; Procaccia, I.; Tiberkevich, V.. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 70:(2004), pp. 0554301(R)-0554301(R). [10.1103/PhysRevE.70.055301]

Drag reduction by a linear velocity profile

DE ANGELIS, Elisabetta;CASCIOLA, Carlo Massimo;
2004

Abstract

The drag reduction by polymers in turbulent flows was analyzed. The drag reduction, in a recent theory, was found to be consistent with the effective viscocity growing linearly with the distance from the wall. the reduction in the Reynolds stress overwhelmed the increase in the viscous drag by the self-consistent solution. By using the direct numerical simulations it was shown that a linear viscosity profile reduced the drag in agreement with the theory and in close correspondence with direct simulations of the FENE-P model at the same flow conditions.
2004
01 Pubblicazione su rivista::01a Articolo in rivista
Drag reduction by a linear velocity profile / DE ANGELIS, Elisabetta; Casciola, Carlo Massimo; L'Vov, V. S.; Pomyalov, A.; Procaccia, I.; Tiberkevich, V.. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 70:(2004), pp. 0554301(R)-0554301(R). [10.1103/PhysRevE.70.055301]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/365253
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 34
  • ???jsp.display-item.citation.isi??? 35
social impact