Is multiscaling an artifact in the stochastically forced Burgers equation?
We study turbulence in the one-dimensional Burgers equation with a white-in-time, Gaussian random force that has a Fourier-space spectrum approximately 1/k, where k is the wave number. From very high-resolution numerical simulations, in the limit of vanishing viscosity, we find evidence for multiscaling of velocity structure functions which cannot be falsified by standard tests. We find a new artifact in which logarithmic corrections can appear disguised as anomalous scaling and conclude that bifractal scaling is likely.
Mitra
Dhrubaditya
D
Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore.
Bec
Jérémie
J
Pandit
Rahul
R
Frisch
Uriel
U