Purpose of the present work is the analysis of the generalized Kolmogorov equation applied to the direct numerical simulation data of a turbulent channel flow. The multi-dimensional description of the anisotropic behavior of turbulent energy production, transportdissipation is shown to be relevant for the understanding and modeling of the wall-turbulent physics with special care to the phenomenon of reverse energy flux. These results are proven instrumental also for the correct computation of wall-turbulence when a large eddy simulation approach is considered. The capability of a filtered velocity field to correctly reproduce the wall-turbulent dynamics at different ranges of scales and wall-distances as a function of the filter length will be assessed via filtered direct numerical simulation (DNS) and large eddy simulation data. The possibility of new modeling approaches is also highlighted. © 2012 American Institute of Physics.
Anisotropic dynamics and sub-grid energy transfer in wall-turbulence / Cimarelli, A.; De Angelis, E.. - In: PHYSICS OF FLUIDS. - ISSN 1070-6631. - 24:1(2012), pp. 015102-015119. [10.1063/1.3675626]