Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence

Details Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm43b..04r&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM43B-04

Physics

Condensed Matter

Statistical Mechanics

2149 Mhd Waves And Turbulence, 2159 Plasma Waves And Turbulence, 3210 Modeling, 3250 Fractals And Multifractals

Scientific paper

The solar wind provides a natural laboratory for observations of MHD turbulence over extended temporal scales. We identify approximate self-similarity in the Probability Density Functions (PDF) of fluctuations in certain solar wind in- situ bulk plasma parameters. Whereas the fluctuations of speed for example are multi-fractal, we find that under certain conditions the fluctuations in the ion density, field and particle energy densities and MHD-approximated Poynting flux are approximately self-similar on timescales up to tens of hours. The intermittency of thesystem is then expressed in these parameters through the non-Gaussian nature of the single curve that describes the fluctuations PDF up to this timescale. Self- similarity implies that a simple Fokker-Planck model exists for the timeseries and we derive this here along with the associated Langevin equation- a stochastic dynamical equation for the fluctuations in the timeseries. This is an example of a generic approach to turbulence, with connections with our understanding of the statistical mechanics of correlated systems generally.

Affiliated with

Also associated with

No associations

Rating

Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence 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 Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermittency, Self- Similarity and a stochastic dynamical model for Solar Wind Turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1469518