Langevin approach to generate synthetic turbulence
chao-dyn
2009-10-30 v1 Chaotic Dynamics
Abstract
We present an analytical scheme, easily implemented numerically, to generate synthetic Gaussian turbulent flows by using a linear Langevin equation, where the noise term acts as a stochastic stirring force. The characteristic parameters of the velocity field are well introduced, in particular the kinematic viscosity and the spectrum of energy. As an application, the diffusion of a passive scalar is studied for two different energy spectra. Numerical results are compared favorably with analytical calculations.
Keywords
Cite
@article{arxiv.chao-dyn/9703015,
title = {Langevin approach to generate synthetic turbulence},
author = {A. C. Marti and J. M. Sancho and F. Sagues and A. Careta},
journal= {arXiv preprint arXiv:chao-dyn/9703015},
year = {2009}
}
Comments
7 pages, REVTEX, 6 figures. To appear in Physics of Fluids (April 1997)