Characterization of turbulence in inhomogeneous anisotropic flows
Fluid Dynamics
2008-05-21 v1
Abstract
We introduce a global quantity that characterizes turbulent fluctuations in inhomogeneous anisotropic flows. This time-dependent quantity is based on spatial averages of global velocity fields rather than classical temporal averages of local velocities. provides a useful quantitative characterization of any turbulent flow through generally only two parameters, its time average and its variance . Properties of and are experimentally studied in the typical case of the von K\'arm\'an flow and used to characterize the scale by scale energy budget as a function of the forcing mode as well as the transition between two flow topologies.
Cite
@article{arxiv.0805.3092,
title = {Characterization of turbulence in inhomogeneous anisotropic flows},
author = {Pierre-Philippe Cortet and Pantxo Diribarne and Romain Monchaux and Arnaud Chiffaudel and Francois Daviaud and Berengere Dubrulle},
journal= {arXiv preprint arXiv:0805.3092},
year = {2008}
}