SPECTRAL SCALING LAWS IN MAGNETOHYDRODYNAMIC TURBULENCE SIMULATIONS AND IN THE SOLAR WIND

2011/06/03 by Stanislav Boldyrev, Jean Carlos Perez, Joseph E. Borovsky +1 · 3 citations
Engineering · Physics and Astronomy · #Compressibility #Fluid dynamics and aerodynamics studies #Ionosphere and magnetosphere dynamics #Magnetic field #Magnetohydrodynamic drive #Magnetohydrodynamic turbulence #Range (aeronautics) #Scaling #Scaling law #Solar and Space Plasma Dynamics #Solar wind #Turbulence #astro-ph.GA #physics.flu-dyn #physics.plasm-ph

paper · pdf · doi:10.1088/2041-8205/741/1/l19

arxiv created 2011/06/03 · openalex publication_date 2011/10/13 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The question is addressed to what extent incompressible magnetohydrodynamics (MHD) can describe random magnetic and velocity fluctuations measured in the solar wind. It is demonstrated that distributions of spectral indices for the velocity, magnetic field, and total energy obtained from high resolution numerical simulations are qualitatively and quantitatively similar to solar wind observations at 1 AU. Both simulations and observations show that in the inertial range the magnetic field spectrum E_b is steeper than the velocity spectrum E_v with E_b >~ E_v and that the residual energy E_R = E_b-E_v decreases nearly following a k_perp^-2 scaling.

Citations

• NUMERICAL SIMULATIONS OF IMBALANCED STRONG MAGNETOHYDRODYNAMIC TURBULENCE
• MHD structures, waves and turbulence in the solar wind: Observations and theories
• Role of Cross-Helicity in Magnetohydrodynamic Turbulence

Cited by

• PARALLEL ELECTRIC FIELD SPECTRUM OF SOLAR WIND TURBULENCE
• Three-dimensional local anisotropy of velocity fluctuations in the solar wind
• Long-term general relativistic magnetohydrodynamics simulations of magnetic field in isolated neutron stars

Related

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• Fluid-like dissipation of magnetic turbulence at electron scales in the solar wind
• Emergence of two inertial sub-ranges in solar wind turbulence: dependence on heliospheric distance and solar activity
• An Intermittent Model for the 1/f Spectrum in the Pristine Solar Wind
• The Implications of Discontinuities for Testing Theories of Turbulence in the Solar Wind