Energy transfer, pressure tensor, and heating of kinetic plasma

Yang, Yan1,2; Matthaeus, William H.2; Parashar, Tulasi N.2; Haggerty, Colby C.2; Roytershteyn, Vadim3; Daughton, William4; Wan, Minping5; Shi, Yipeng1; Chen, Shiyi1,5

2017-07

10.1063/1.4990421

PHYSICS OF PLASMAS   影响因子和分区

1070-664X

1089-7674

Kinetic plasma turbulence cascade spans multiple scales ranging from macroscopic fluid flow to sub-electron scales. Mechanisms that dissipate large scale energy, terminate the inertial range cascade, and convert kinetic energy into heat are hotly debated. Here, we revisit these puzzles using fully kinetic simulation. By performing scale-dependent spatial filtering on the Vlasov equation, we extract information at prescribed scales and introduce several energy transfer functions. This approach allows highly inhomogeneous energy cascade to be quantified as it proceeds down to kinetic scales. The pressure work, -(P . del) . u, can trigger a channel of the energy conversion between fluid flow and random motions, which contains a collision-free generalization of the viscous dissipation in collisional fluid. Both the energy transfer and the pressure work are strongly correlated with velocity gradients. Published by AIP Publishing.

SCI ; EI

英语

其他

[AGS-1460130]

Physics

Physics, Fluids & Plasmas

WOS:000406767900025

AMER INST PHYSICS

20172803935988

Collisional plasmas ; Energy conversion ; Energy transfer ; Information filtering ; Kinetic energy ; Kinetics ; Plasma turbulence ; Vlasov equation

Energy Conversion Issues:525.5 ; Fluid Flow, General:631.1 ; Information Sources and Analysis:903.1 ; Mathematics:921 ; Plasma Physics:932.3

PHYSICS

Web of Science

1.Peking Univ, Coll Engn, Ctr Appl Phys & Technol, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
2.Univ Delaware, Dept Phys & Astron, Newark, DC 19716 USA
3.Space Sci Inst, Boulder, CO 80301 USA
4.Los Alamos Natl Lab, Los Alamos, NM 87545 USA
5.Southern Univ Sci & Technol China, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China

Yang, Yan,Matthaeus, William H.,Parashar, Tulasi N.,et al. Energy transfer, pressure tensor, and heating of kinetic plasma[J]. PHYSICS OF PLASMAS,2017,24(7).

Yang, Yan.,Matthaeus, William H..,Parashar, Tulasi N..,Haggerty, Colby C..,Roytershteyn, Vadim.,...&Chen, Shiyi.(2017).Energy transfer, pressure tensor, and heating of kinetic plasma.PHYSICS OF PLASMAS,24(7).

Yang, Yan,et al."Energy transfer, pressure tensor, and heating of kinetic plasma".PHYSICS OF PLASMAS 24.7(2017).