  From DNS of turbulence decaying from specified initial conditions for the
range of initial Taylor-Reynolds numbers 2.58 < R{\lambda}(0) < 358.6, it was
found that the shape of the iconic curve of dimensionless dissipation versus
Reynolds number depended strongly on the choice of measurement time. For our
preferred time, a composite based on peak values in the dissipation and
inertial transfer curves, the result was virtually identical to the forced,
stationary case. In the course of studying onset criteria, we found that the
exponent for the power-law decay of the energy decreased with increasing
Reynolds number and lay in the range 1.35 < n < 2.60. An additional run was
performed, using the data from a stationary, forced simulation with R{\lambda}
= 335 for the initial condition. The results of this suggested that the time
taken for energy to pass through the cascade was about one half of an initial
eddy turnover time.
