Direct Measurement of the Dissipation Rate Spectrum around Ion Kinetic Scales in Space Plasma Turbulence
نویسندگان
چکیده
منابع مشابه
Intermittent Dissipation and Heating in 3D Kinetic Plasma Turbulence.
High resolution, fully kinetic, three dimensional (3D) simulation of collisionless plasma turbulence shows the development of turbulence characterized by sheetlike current density structures spanning a range of scales. The nonlinear evolution is initialized with a long wavelength isotropic spectrum of fluctuations having polarizations transverse to an imposed mean magnetic field. We present evi...
متن کاملA Hilbert-Huang transform approach to space plasma turbulence at kinetic scales
Heliospheric space plasmas are highly turbulent media and display multiscale fluctuations over a wide range of scales from the magnetohydrodynamic domain down to the kinetic one. The study of turbulence features is traditionally based on spectral and canonical structure function analysis. Here, we present an novel approach to the analysis of the multiscale nature of plasma turbulent fluctuation...
متن کاملEnergy Spectrum in the Dissipation Range of Fluid Turbulence
High resolution, direct numerical simulations of three-dimensional incompressible Navier-Stokes equations are carried out to study the energy spectrum in the dissipation range. An energy spectrum of the form A(k/kd) _ exp[-/3k/kd] is confirmed. The possible values of the parameters c_ and/3, as well as their dependence on Reynolds numbers and length scales, are investigated, showing good agreem...
متن کاملEnergy Spectrum in the Dissipation Range of Fluid Turbulence
Parameters a), and b), as a function of R. These values are calculated by performing a least-squares t to d ln E=d ln k vs. k=k d (see Fig. 1). Points indicated by the \" symbol, correspond to measurements done in the range k=k d < 3 for all runs in Table I; the diamonds correspond to k=k d > 6 for runs 1 through 4. 12 FIG. 2. Local values of and as a function of k=k d , calculated for run 3 in...
متن کاملSpectral Cascade and Energy Dissipation in Kinetic Alfvén Wave Turbulence
Spectral cascade and energy dissipation of Alfven turbulence is studied using a massively parallel gyrokinetic particle simulation. The simulation observes a magnetic energy spectrum with a power law index of ”-5/3” in the long wavelength, which agrees with magnetohydrodynamic results in the inertial range. In the dissipation range, the simulation finds a spectral break point on the ion gyrorad...
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: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab2a79