Effect of a guide field on the turbulence like properties of magnetic reconnection

S. Adhikari; M. A. Shay; T. N. Parashar; W. H. Matthaeus; P. S. Pyakurel; J. E. Stawarz; J. P. Eastwood

doi:10.1063/5.0150929

Effect of a guide field on the turbulence like properties of magnetic reconnection

S. Adhikari^*, M. A. Shay, T. N. Parashar, W. H. Matthaeus, P. S. Pyakurel, J. E. Stawarz, J. P. Eastwood

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

The effect of an external guide field on the turbulence-like properties of magnetic reconnection is studied using five different 2.5D kinetic particle-in-cell (PIC) simulations. The magnetic energy spectrum is found to exhibit a slope of approximately −5/3 in the inertial range, independent of the guide field. On the contrary, the electric field spectrum in the inertial range steepens more with the guide field and approaches a slope of −5/. In addition, spectral analysis of the different terms of the generalized Ohm's law is performed and found to be consistent with PIC simulations of turbulence and MMS observations. Finally, the guide field effect on the energy transfer behavior is examined using the von Kármán–Howarth (vKH) equation based on incompressible Hall-MHD. The general characteristics of the vKH equation with constant rate of energy transfer in the inertial range are consistent in all the simulations. This suggests that the qualitative behavior of energy spectrum and energy transfer in reconnection are similar to that of turbulence, indicating that reconnection fundamentally involves an energy cascade.

Original language	English
Article number	082904
Number of pages	14
Journal	Physics of Plasmas
Volume	30
Issue number	8
DOIs	https://doi.org/10.1063/5.0150929
Publication status	Published - 1 Aug 2023

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10.1063/5.0150929

POP23_AR_00157Accepted author manuscript, 4.9 MBLicence: CC BY

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title = "Effect of a guide field on the turbulence like properties of magnetic reconnection",

abstract = "The effect of an external guide field on the turbulence-like properties of magnetic reconnection is studied using five different 2.5D kinetic particle-in-cell (PIC) simulations. The magnetic energy spectrum is found to exhibit a slope of approximately −5/3 in the inertial range, independent of the guide field. On the contrary, the electric field spectrum in the inertial range steepens more with the guide field and approaches a slope of −5/. In addition, spectral analysis of the different terms of the generalized Ohm's law is performed and found to be consistent with PIC simulations of turbulence and MMS observations. Finally, the guide field effect on the energy transfer behavior is examined using the von K{\'a}rm{\'a}n–Howarth (vKH) equation based on incompressible Hall-MHD. The general characteristics of the vKH equation with constant rate of energy transfer in the inertial range are consistent in all the simulations. This suggests that the qualitative behavior of energy spectrum and energy transfer in reconnection are similar to that of turbulence, indicating that reconnection fundamentally involves an energy cascade.",

author = "S. Adhikari and Shay, {M. A.} and Parashar, {T. N.} and Matthaeus, {W. H.} and Pyakurel, {P. S.} and Stawarz, {J. E.} and Eastwood, {J. P.}",

note = "Funding information: This research also used NERSC resources, a U.S. DOE Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. S.A. and M.A.S. acknowledge support from NASA No. LWS 80NSSC20K0198. W.H.M is supported by NSF DOE Grant No. AGS 2108834 at the University of Delaware, by the IMAP project (Princeton Subcontract No. SUB0000317) and by the NASA LWS program FST grant to New Mexico Consortium (Subcontract No. 655-001 to Delaware). J.E.S. is supported by Royal Society University Research Fellowship No. URF\R1\201286, and J.P.E. is supported by UKRI/STFC Grant No. ST/W001071/1. For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising.",

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AU - Adhikari, S.

AU - Shay, M. A.

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AU - Matthaeus, W. H.

AU - Pyakurel, P. S.

AU - Stawarz, J. E.

AU - Eastwood, J. P.

N1 - Funding information: This research also used NERSC resources, a U.S. DOE Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. S.A. and M.A.S. acknowledge support from NASA No. LWS 80NSSC20K0198. W.H.M is supported by NSF DOE Grant No. AGS 2108834 at the University of Delaware, by the IMAP project (Princeton Subcontract No. SUB0000317) and by the NASA LWS program FST grant to New Mexico Consortium (Subcontract No. 655-001 to Delaware). J.E.S. is supported by Royal Society University Research Fellowship No. URF\R1\201286, and J.P.E. is supported by UKRI/STFC Grant No. ST/W001071/1. For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising.

PY - 2023/8/1

Y1 - 2023/8/1

N2 - The effect of an external guide field on the turbulence-like properties of magnetic reconnection is studied using five different 2.5D kinetic particle-in-cell (PIC) simulations. The magnetic energy spectrum is found to exhibit a slope of approximately −5/3 in the inertial range, independent of the guide field. On the contrary, the electric field spectrum in the inertial range steepens more with the guide field and approaches a slope of −5/. In addition, spectral analysis of the different terms of the generalized Ohm's law is performed and found to be consistent with PIC simulations of turbulence and MMS observations. Finally, the guide field effect on the energy transfer behavior is examined using the von Kármán–Howarth (vKH) equation based on incompressible Hall-MHD. The general characteristics of the vKH equation with constant rate of energy transfer in the inertial range are consistent in all the simulations. This suggests that the qualitative behavior of energy spectrum and energy transfer in reconnection are similar to that of turbulence, indicating that reconnection fundamentally involves an energy cascade.

AB - The effect of an external guide field on the turbulence-like properties of magnetic reconnection is studied using five different 2.5D kinetic particle-in-cell (PIC) simulations. The magnetic energy spectrum is found to exhibit a slope of approximately −5/3 in the inertial range, independent of the guide field. On the contrary, the electric field spectrum in the inertial range steepens more with the guide field and approaches a slope of −5/. In addition, spectral analysis of the different terms of the generalized Ohm's law is performed and found to be consistent with PIC simulations of turbulence and MMS observations. Finally, the guide field effect on the energy transfer behavior is examined using the von Kármán–Howarth (vKH) equation based on incompressible Hall-MHD. The general characteristics of the vKH equation with constant rate of energy transfer in the inertial range are consistent in all the simulations. This suggests that the qualitative behavior of energy spectrum and energy transfer in reconnection are similar to that of turbulence, indicating that reconnection fundamentally involves an energy cascade.

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U2 - 10.1063/5.0150929

DO - 10.1063/5.0150929

M3 - Article

SN - 1070-664X

VL - 30

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 8

M1 - 082904

ER -

Effect of a guide field on the turbulence like properties of magnetic reconnection

Abstract

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