Gogoberidze, Grigol, Chapman, Sandra C. and Hnat, B. (2012) Generation of residual energy in the turbulent solar wind. Physics of Plasmas, Vol.19 (No.10). Article no. 102310. doi:10.1063/1.4764469 ISSN 1070-664X.

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Abstract

n situ observations of the fluctuating solar wind flow show that the energy of magnetic field fluctuations always exceeds that of the kinetic energy, and therefore the difference between the kinetic and magnetic energies, known as the residual energy, is always negative. The same behaviour is found in numerical simulations of magnetohydrodynamic turbulence. We study the dynamics of the residual energy for strong, anisotropic, critically balanced magnetohydrodynamic turbulence using the eddy damped quasi-normal Markovian approximation. Our analysis shows that for stationary critically balanced magnetohydrodynamic turbulence, negative residual energy will always be generated by nonlinear interacting Alfvén waves. This offers a general explanation for the observation of negative residual energy in solar wind turbulence and in the numerical simulations.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Physics of Plasmas
Publisher:	American Institute of Physics
ISSN:	1070-664X
Official Date:	2012
Dates:	Date Event 2012 Published
Volume:	Vol.19
Number:	No.10
Page Range:	Article no. 102310
DOI:	10.1063/1.4764469
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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