Effect of initial conditions on the mean energy dissipation rate and the scaling exponent
Implications of the expectation that the mean energy dissipation rate <epsilon> should become independent of viscosity at sufficiently large values of R(lambda), the Taylor microscale Reynolds number, are examined within the framework of small-scale intermittency and an adequate description of the second-order velocity structure function over the dissipative and inertial ranges. For nominally the same flow, a two-dimensional wake, but with different initial conditions, values of C(epsilon) identical with<epsilon>L/u('3), the scaling exponent and the Kolmogorov constant differ at the same R(lambda).
Antonia
RA
Department of Mechanical Engineering, University of Newcastle, New South Wales 2308, Australia.
Pearson
BR