Scaling exponents of the velocity structure functions in the interplanetary medium

Details Scaling exponents of the velocity structure functions in the interplanetary medium Scaling exponents of the velocity structure functions in the interplanetary medium

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994angeo..12..585c&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 12, no. 7, p. 585-590

Physics

21

Energy Transfer, Interplanetary Medium, Magnetohydrodynamic Turbulence, Scale Effect, Solar Wind, Space Plasmas, Velocity Distribution, Intermittency, Magnetohydrodynamic Flow, Magnetohydrodynamics, Vortices

Scientific paper

We analyze the scaling exponents of the velocity structure functions, obtained from the velocity fluctuations measured in the interplanetary space plasma. Using the expression for the energy transfer rate which seems the most relevant in describing the evolution of the pseudo-energy densities in the interplanetary medium, we introduce an energy cascade model derived from a simple fragmentation process, which takes into account the intermittency effect. In the absence and in the presence of the large-scale magnetic field decorrelation effect the model reduces to the fluid and the hydromagnetic p-model, respectively. We show that the scaling exponents of the q-th power of the velocity structure functions, as obtained by the model in the absence of the decorrelation effect, furnishes the best-fit to the data analyzed from the Voyager 2 velocity field measurements at 8.5 AU. Our results allow us to hypothesize a new kind of scale-similarity for magnetohydrodynamic turbulence when the decorrelation effect is at work, related to the fourth-order velocity structure function.

Affiliated with

Also associated with

No associations

Rating

Scaling exponents of the velocity structure functions in the interplanetary medium 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 Scaling exponents of the velocity structure functions in the interplanetary medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scaling exponents of the velocity structure functions in the interplanetary medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1493785