A systematic study of drag reduction was performed on the basis of DNS of the FENE-P model. Simulations of Newtonian and viscoelastic flows in channel configuration at the same friction Reynolds number were investigated. First, the list of empirical modes that represent the velocity field in an optimal way in an energy decreasing order was found. The important discovery was that this list contains the very same modes for the Newtonian and viscoelastic flows.
Drag reduction by polymers in turbulent channel flows: Energy redistribution between invariant empirical modes / DE ANGELIS, Elisabetta; Casciola, Carlo Massimo; LVOV V., S; Piva, Renzo; Procaccia, I.. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 67:(2003), pp. 056312-1-056312-11. [10.1103/PhysRevE.67.056312]
Drag reduction by polymers in turbulent channel flows: Energy redistribution between invariant empirical modes
DE ANGELIS, Elisabetta;CASCIOLA, Carlo Massimo;PIVA, Renzo;
2003
Abstract
A systematic study of drag reduction was performed on the basis of DNS of the FENE-P model. Simulations of Newtonian and viscoelastic flows in channel configuration at the same friction Reynolds number were investigated. First, the list of empirical modes that represent the velocity field in an optimal way in an energy decreasing order was found. The important discovery was that this list contains the very same modes for the Newtonian and viscoelastic flows.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
