The scale energy budget utilizes a modified version of the classical Kolmogorov equation of wall turbulence to develop an evolution equation for the second order structure function [R. J. Hill, “Exact second-order structure-function relationships,” J. Fluid Mech. 468, 317 (2002)]. This methodology allows for the simultaneous characterization of the energy cascade and spatial fluxes in turbulent shear flows across the entire physical domain as well as the range of scales. The present study utilizes this methodology to characterize the effects of Reynolds number on the balance of energy fluxes in turbulent channel flows. Direct numerical simulation data in the range Re_tau = 300–934 are compared to previously published results at Re_tau =180.
N. Saikrishnan, E. De Angelis, E. K. Longmire, I. Marusic, C. M. Casciola, R. Piva (2012). Reynolds number effects on scale energy balance in wall turbulence. PHYSICS OF FLUIDS, 24, 015101-1-015101-12 [10.1063/1.3673609].
Reynolds number effects on scale energy balance in wall turbulence
DE ANGELIS, ELISABETTA;
2012
Abstract
The scale energy budget utilizes a modified version of the classical Kolmogorov equation of wall turbulence to develop an evolution equation for the second order structure function [R. J. Hill, “Exact second-order structure-function relationships,” J. Fluid Mech. 468, 317 (2002)]. This methodology allows for the simultaneous characterization of the energy cascade and spatial fluxes in turbulent shear flows across the entire physical domain as well as the range of scales. The present study utilizes this methodology to characterize the effects of Reynolds number on the balance of energy fluxes in turbulent channel flows. Direct numerical simulation data in the range Re_tau = 300–934 are compared to previously published results at Re_tau =180.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
