Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2003-05-23
Nonlinear Sciences
Chaotic Dynamics
12 pages, 10 figures, submitted to Phys.Rev. E
Scientific paper
10.1103/PhysRevE.68.066302
Numerical simulations of fully developed turbulence driven by a modulated energy input rate or driving force are performed within two dynamical cascade models, the GOY shell model and a reduced wave vector set approximation of the Navier-Stokes equation (REWA). The frequency behavior of the system response is studied and compared with predictions from a variable range mean-field theory, which excludes turbulent fluctuations. In agreement with the mean-field approach we find a constant response amplitude for low driving frequencies and a 1/w-decay of the amplitude for high frequencies. In the mean-field theory, the finite cascade time scale had lead to an oscillating behavior of the response amplitude as a function of the driving frequency. In the simulations of both models we observe the main maximum. The higher maxima and minima are completely washed out by fluctuations.
der Heydt Alice von
Grossmann Siegfried
Lohse Detlef
No associations
LandOfFree
Response maxima in modulated turbulence Part II: Numerical simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Response maxima in modulated turbulence Part II: Numerical simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Response maxima in modulated turbulence Part II: Numerical simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-133626