Dependence of decaying homogeneous isotropic turbulence on initial conditions

TL;DR

This paper critically reanalyzes existing turbulence data, revealing inconsistencies with prior conclusions and highlighting differences in turbulence decay behaviors based on initial conditions and grid types.

Contribution

It provides a detailed reexamination of previous turbulence data, challenging earlier interpretations and emphasizing the impact of initial conditions on turbulence decay.

Findings

Data do not support original conclusions.

Significant differences between grid-generated turbulence behaviors.

Initial conditions strongly influence turbulence decay patterns.

Abstract

We conduct a careful analysis of the data provided by Krogstad & Davidson (2011) and show that their data do not support their conclusions. According to their published data, their decaying approximately homogeneous isotropic turbulent flows are, invariably, clearly different from Saffman turbulence; and very clearly marked differences exist between the far downstream turbulence behaviors generated by their conventional grid and by their multiscale cross grids.