Imperial College London
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Professor Jonathan P. Eastwood

Faculty of Natural Sciences, Department of Physics

Professor of Space Physics
 
 
 
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Contact

 

jonathan.eastwood Website

 
 
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Assistant

 

Mr Luke Kratzmann +44 (0)20 7594 7770

 
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Location

 

Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Adhikari:2020:10.1063/1.5128376,
author = {Adhikari, S and Shay, MA and Parashar, TN and Pyakurel, PS and Matthaeus, WH and Godzieba, D and Stawarz, JE and Eastwood, JP and Dahlin, JT},
doi = {10.1063/1.5128376},
journal = {Physics of Plasmas},
pages = {1--10},
title = {Reconnection from a turbulence perspective},
url = {http://dx.doi.org/10.1063/1.5128376},
volume = {27},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The spectral properties associated with laminar, anti-parallel reconnection are examined using a 2.5D kinetic particle in cell simulation. Both the reconnection rate and the energy spectrum exhibit three distinct phases: an initiation phase where the reconnection rate grows, a quasi-steady phase, and a declining phase where both the reconnection rate and the energy spectrum decrease. During the steady phase, the energy spectrum exhibits approximately a double power law behavior, with a slope near −5/3 at wave numbers smaller than the inverse ion inertial length and a slope steeper than −8/3 for larger wave numbers up to the inverse electron inertial length. This behavior is consistent with a Kolmogorov energy cascade and implies that laminar reconnection may fundamentally be an energy cascade process. Consistent with this idea is the fact that the reconnection rate exhibits a rough correlation with the energy spectrum at wave numbers near the inverse ion inertial length. The 2D spectrum is strongly anisotropic with most energy associated with the wave vector direction normal to the current sheet. Reconnection acts to isotropize the energy spectrum, reducing the Shebalin angle from an initial value of 70° to about 48° (nearly isotropic) by the end of the simulation. The distribution of energy over length scales is further analyzed by dividing the domain into spatial subregions and employing structure functions.
AU  - Adhikari,S
AU  - Shay,MA
AU  - Parashar,TN
AU  - Pyakurel,PS
AU  - Matthaeus,WH
AU  - Godzieba,D
AU  - Stawarz,JE
AU  - Eastwood,JP
AU  - Dahlin,JT
DO  - 10.1063/1.5128376
EP  - 10
PY  - 2020///
SN  - 1070-664X
SP  - 1
TI  - Reconnection from a turbulence perspective
T2  - Physics of Plasmas
UR  - http://dx.doi.org/10.1063/1.5128376
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000526858400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://aip.scitation.org/doi/10.1063/1.5128376
UR  - http://hdl.handle.net/10044/1/79456
VL  - 27
ER  -
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