Influence of tearing instability on magnetohydrodynamic turbulence
نویسندگان
چکیده
منابع مشابه
On two-dimensional magnetohydrodynamic turbulence
It is shown that two-dimensional MHD turbulence is in certain respects closer to threedimensional than to two-dimensional hydrodynamic turbulence. A second-order closure indicates that: (i) a t zero viscosity and magnetic diffusivity, a singularity appears a t a finite time; (ii) there is an energy cascade to small scales and an inverse cascade of squared magnetic potential, in agreement with a...
متن کاملOn the Spectrum of Magnetohydrodynamic Turbulence
We propose a phenomenological model for incompressible magnetohydrodynamic turbulence. We argue that nonlinear-wave interaction weakens as the energy cascade proceeds to small scales, however, the anisotropy of fluctuations along the large-scale magnetic field increases, which makes turbulence strong at all scales. To explain the weakening of the interaction, we propose that smallscale fluctuat...
متن کاملImbalanced Weak Magnetohydrodynamic Turbulence
WeakMHD turbulence consists of waves that propagate along magnetic field lines, in both directions. When two oppositely directed waves collide, they distort each other, without changing their respective energies. Each wave suffers many collisions before cascading; by contrast, in strong MHD turbulence, waves cascade on the same timescale at which they collide. ‘‘ Imbalance ’’ means that more en...
متن کاملAnisotropic scaling of magnetohydrodynamic turbulence.
We present a quantitative estimate of the anisotropic power and scaling of magnetic field fluctuations in inertial range magnetohydrodynamic turbulence, using a novel wavelet technique applied to spacecraft measurements in the solar wind. We show for the first time that, when the local magnetic field direction is parallel to the flow, the spacecraft-frame spectrum has a spectral index near 2. T...
متن کاملSpectrum of weak magnetohydrodynamic turbulence.
Turbulence of magnetohydrodynamic waves in nature and in the laboratory is generally cross-helical or nonbalanced, in that the energies of Alfvén waves moving in opposite directions along the guide magnetic field are unequal. Based on high-resolution numerical simulations it is proposed that such turbulence spontaneously generates a condensate of the residual energy E(v) - E(b) at small field-p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2018
ISSN: 2470-0045,2470-0053
DOI: 10.1103/physreve.98.033209