On the normalized turbulent energy dissipation rate

Abstract

This paper revisits values of the normalized energy dissipation rate (Cεe) in different flows (two-dimensional wakes, grid turbulence, and homogeneous shear flow). Previously published as well as new data are considered over a relatively wide range of the Taylor-microscale Reynolds number Rλ. Cε exhibits wide scatter (in the range 0.5-2.5 for Rλ;>50) although, for a given flow and initial conditions, it is independent of Rλ when the latter is sufficiently large. An alternative definition [B. R. Pearson, P.-Å. Krogstad, and W. van de Water, "Measurements of the turbulent energy dissipation rate," Phys. Fluids 14, 1288 (2002)] of Cε has been checked in the same flows but has failed to yield a universal value for the coefficient. © 2005 American Institute of Physics.SCOPUS: ar.jinfo:eu-repo/semantics/publishe