The drag reduction phenomena under homogeneous turbulence conditions was analyzed in terms of a self-dependent effective viscosity. The differences between drag reduction in wall bounded and homogeneous flows were also discussed. It was observed that the effective velocity will be different from the Newtonian one in terms of scale. The drag reduction in homogeneous flow appeared as an increase of the rms fluctuations of the large scale while in case of wall bounded flows the drag reduction corresponds to the increase in the mean flow velocity.
Benzi, R., Ching, E., Procaccia, I. (2004). Drag reduction in homogeneous turbulence by scale-dependent effective viscosity. PHYSICAL REVIEW E, 70(2 - Part 2), 026304 [10.1103/PhysRevE.70.026304].
Drag reduction in homogeneous turbulence by scale-dependent effective viscosity
BENZI, ROBERTO;
2004-01-01
Abstract
The drag reduction phenomena under homogeneous turbulence conditions was analyzed in terms of a self-dependent effective viscosity. The differences between drag reduction in wall bounded and homogeneous flows were also discussed. It was observed that the effective velocity will be different from the Newtonian one in terms of scale. The drag reduction in homogeneous flow appeared as an increase of the rms fluctuations of the large scale while in case of wall bounded flows the drag reduction corresponds to the increase in the mean flow velocity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
