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Kinetic Simulations of Magnetized Turbulence in Astrophysical Plasmas
G. G. Howes, W. Dorland, S. C. Cowley +4
This letter presents the first ab initio, fully electromagnetic, kinetic simulations of magnetized turbulence in a homogeneous, weakly collisional plasma at the scale of the ion La…
Generation of Magnetic Field by Combined Action of Turbulence and Shear
T. A. Yousef, T. Heinemann, A. A. Schekochihin +5
The feasibility of a mean-field dynamo in nonhelical turbulence with superimposed linear shear is studied numerically in elongated shearing boxes. Exponential growth of magnetic fi…
Nonlinear growth of firehose and mirror fluctuations in turbulent galaxy-cluster plasmas
A. A. Schekochihin, S. C. Cowley, R. M. Kulsrud +2
In turbulent high-beta astrophysical plasmas (exemplified by the galaxy cluster plasmas), pressure-anisotropy-driven firehose and mirror fluctuations grow nonlinearly to large ampl…
Dissipation-Scale Turbulence in the Solar Wind
Gregory G. Howes, Steven C. Cowley, William Dorland +3
We present a cascade model for turbulence in weakly collisional plasmas that follows the nonlinear cascade of energy from the large scales of driving in the MHD regime to the small…
A Model of Turbulence in Magnetized Plasmas: Implications for the Dissipation Range in the Solar Wind
Gregory G. Howes, Steven C. Cowley, William Dorland +3
This paper studies the turbulent cascade of magnetic energy in weakly collisional magnetized plasmas. A cascade model is presented, based on the assumptions of local nonlinear ener…
Fluctuation dynamo and turbulent induction at low magnetic Prandtl numbers
A. A. Schekochihin, A. B. Iskakov, S. C. Cowley +3
This paper is a detailed report on a programme of simulations used to settle a long-standing issue in the dynamo theory and demonstrate that the fluctuation dynamo exists in the li…