Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations

Pezzi, O.1,2,3; Yang, Y.4; Valentini, F.3; Servidio, S.3; Chasapis, A.5,6; Matthaeus, W. H.5,6; Veltri, P.3

2019-07

10.1063/1.5100125

PHYSICS OF PLASMAS   影响因子和分区

1070-664X

1089-7674

Kinetic simulations based on the Eulerian Hybrid Vlasov-Maxwell (HVM) formalism permit the examination of plasma turbulence with a useful resolution of the proton velocity distribution function. The HVM model is employed here to study the balance of energy, focusing on channels of conversion that lead to proton kinetic effects, including growth of internal energy and temperature anisotropies. We show that this Eulerian simulation approach, which is almost noise-free, is able to provide an accurate energy balance for protons. The results demonstrate explicitly that the recovered temperature growth is directly related to the role of the pressure-strain interaction. Furthermore, analysis of local spatial correlations indicates that the pressure-strain interaction is qualitatively associated with strong-current, high-vorticity structures although other local terms-such as the heat flux-weaken the correlation. These numerical capabilities based on the Eulerian approach will enable a deeper study of transfer and conversion channels in weakly collisional Vlasov plasmas.

SCI ; EI

英语

其他

Parker Solar Probe project under HSR Grant[80SSC18K1648]

Physics

Physics, Fluids & Plasmas

WOS:000478679900065

AMER INST PHYSICS

20192907199820

Distribution functions ; Energy conversion ; Heat flux ; Plasma turbulence

Energy Conversion Issues:525.5 ; Heat Transfer:641.2 ; Probability Theory:922.1 ; Plasma Physics:932.3

PHYSICS

Web of Science

1.Gran Sasso Sci Inst, Viale F Crispi 7, I-67100 Laquila, Italy
2.INFN, Lab Nazl Gran Sasso, Via G Acitelli 22, I-67100 Assergi, AQ, Italy
3.Univ Calabria, Dipartimento Fis, I-87036 Cosenza, Italy
4.Southern Univ Sci & Technol, Shenzhen 51805, Guangdong, Peoples R China
5.Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
6.Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

Pezzi, O.,Yang, Y.,Valentini, F.,et al. Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations[J]. PHYSICS OF PLASMAS,2019,26(7).

Pezzi, O..,Yang, Y..,Valentini, F..,Servidio, S..,Chasapis, A..,...&Veltri, P..(2019).Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations.PHYSICS OF PLASMAS,26(7).

Pezzi, O.,et al."Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations".PHYSICS OF PLASMAS 26.7(2019).