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Statistics of Total Pressure in Kinetic Plasma Turbulence
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  • Subash Adhikari,
  • T N Parashar,
  • W H Matthaeus,
  • M A Shay,
  • P A Cassak
Subash Adhikari

Corresponding Author:[email protected]

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T N Parashar
W H Matthaeus
M A Shay
P A Cassak

Abstract

Although pressure plays a vital role in the dynamics of the turbulent plasmas, pressure statistics have not been studied as extensively as other plasma properties. The studies that have focused on pressure are mostly based on hydrodynamic turbulence or have been formulated in the nearly incompressible magnetohydrodynamics (NIMHD) framework. However, less attention has been paid to the scaling properties of pressure in kinetic plasma. In this study, we explore the statistics of magnetic, thermal, and total pressure fluctuation in kinetic collisionless turbulence. A 2.5D kinetic particle-in-cell (PIC) simulation of turbulence is used to investigate pressure balance via the evolution of thermal and magnetic pressure. Further, the behavior of thermal, magnetic, and total pressure structure function and their corresponding spectrum is explored. Finally, we evaluate higher-order total pressure structure functions to discuss intermittency and compare the power exponents with higher-order structure functions of velocity and magnetic fluctuations.

Preprint timeline

22 Dec 2022Submitted to AGU Fall Meeting 2022
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03 Jan 2023Published in AGU Fall Meeting 2022
19 Jan 2023Editor invited a reviewer
19 Jan 2023Review Report #1 received
10.22541/essoar.170264356.67178801/v1
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