Turbulence in 2D kinetic simulations: Dependence on driving frequency (Invited)

Details Turbulence in 2D kinetic simulations: Dependence on driving frequency (Invited) Turbulence in 2D kinetic simulations: Dependence on driving frequency (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51f..04p&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH51F-04

Physics

Plasma Physics

[7863] Space Plasma Physics / Turbulence

Scientific paper

Hybrid kinetic simulations are employed to study the boundary between kinetic processes and MHD-scale fluctuations. A recent study (Parashar et. al. Phys. Plasmas 2010, in press) employing static driving at relatively larger scales indicated that activity at wave resonances might not be necessary to heat a collisionless turbulent plasma. Furthermore the statically driven system appeared to be dominated by strong turbulence. Here we explore the question as to whether the nature and amplitude of turbulent response might be different with time dependent forcing. We study a forced kinetic turbulent system where the forcing has a simple cos(w*t) time dependence, where w is a fixed frequency in each simulation, using a hybrid code with kinetic ions and fluid electrons. As in the previously studied static case, the forcing has a smooth large scale spatial variation. The code contains the fast mode waves as well as the ion cyclotron physics. We discuss the effects of the frequency of forcing on generating turbulence and heating of the plasma. Implications for 2D turbulence in the solar corona will be discussed.

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