Physics – Plasma Physics
Scientific paper
2009-04-10
Doklady Physics, 2009, Vol. 54, No. 2, pp. 93-97
Physics
Plasma Physics
4 pages
Scientific paper
10.1134/S1028335809020128
The purpose of this work is to investigate the spectral properties of the developed isotropic (non-Alfven) MHD turbulence stationary excited by an external force, which injects the cross helicity into the flow simultaneously with the energy. It is shown that the cross helicity blocks the spectral energy transfer in MHD turbulence and results in energy accumulation in the system. This accumulation proceeds until the vortex intensification compensates the decreasing efficiency of nonlinear interactions. The formula for estimating the average turbulence energy is obtained for the set ratio between the injected helicity and energy. It is remarkable that the turbulence accumulates the injected cross helicity at its low rate injection -- the integral correlation coefficient significantly exceeds the ratio between the injected helicity and the energy. It is shown that the spectrum slope gradually increases from "5/3" to "2" with the cross helicity level.
Frick Peter
Mizeva Irina
Stepanov Rodion
No associations
LandOfFree
Role of Cross Helicity in Cascade Processes of MHD 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 Role of Cross Helicity in Cascade Processes of MHD turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of Cross Helicity in Cascade Processes of MHD turbulence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-673923