Other
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.6495m&link_type=abstract
Journal of Geophysical Research, vol. 103, p. 6495
Other
18
Solar Wind, Heliosphere, Magnetohydrodynamic Turbulence, Plasma Decay, Helical Flow, Formalism, Plasma Dynamics
Scientific paper
In an evolving turbulent medium, a natural timescale can be defined in terms of the energy decay time. The time evolution may be complicated by other effects such as energy supply due to driving, and spatial inhomogeneity. In the solar wind the turbulence appears not to be simply engaging in free decay, but rather the energy level observed at a particular position in the heliosphere is affected by expansion, 'mixing', and driving by stream shear. Here we discuss a new approach for estimating the 'age' of solar wind turbulence as a function of heliocentric distance, using the local turbulent decay rate as the natural clock, but taking into account expansion and driving effects. The simplified formalism presented here is appropriate to low cross helicity turbulence in the outer heliosphere especially at low heliolatitudes. We employ Voyager data to illustrate our method, which improves upon the familiar estimates in terms of local eddy turnover times.
Matthaeus William H.
Oughton Sean
Smith Charles W.
No associations
LandOfFree
Dynamical age of solar wind turbulence in the outer heliosphere 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 Dynamical age of solar wind turbulence in the outer heliosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical age of solar wind turbulence in the outer heliosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1604876