Fast impulsive reconnection and current sheet intensification due to electron pressure gradients in semi-collisional plasmas

1996 ◽  
Vol 23 (13) ◽  
pp. 1673-1676 ◽  
Author(s):  
Z. W. Ma ◽  
A. Bhattacharjee
Keyword(s):  
Current Sheet ◽  
Pressure Gradients ◽  
Electron Pressure

Effects of electron pressure anisotropy on current sheet configuration

2016 ◽  
Vol 23 (9) ◽  
pp. 092901 ◽  
Author(s):  
A. V. Artemyev ◽  
I. Y. Vasko ◽  
V. Angelopoulos ◽  
A. Runov
Keyword(s):  
Current Sheet ◽  
Electron Pressure ◽  
Pressure Anisotropy

scholarly journals Fluid simulations of three-dimensional reconnection that capture the lower-hybrid drift instability

2021 ◽  
Vol 87 (1) ◽  
Author(s):  
F. Allmann-Rahn ◽  
S. Lautenbach ◽  
R. Grauer ◽  
R. D. Sydora
Keyword(s):  
Current Sheet ◽  
Large Scale ◽  
Fluid Model ◽  
Initial Perturbation ◽  
Three Dimensional ◽  
Continuum Models ◽  
Lower Hybrid ◽  
Pressure Gradients ◽  
Kinetic Effects ◽  
Drift Instability

Fluid models that approximate kinetic effects have received attention recently in the modelling of large-scale plasmas such as planetary magnetospheres. In three-dimensional reconnection, both reconnection itself and current sheet instabilities need to be represented appropriately. We show that a heat flux closure based on pressure gradients enables a 10-moment fluid model to capture key properties of the lower-hybrid drift instability (LHDI) within a reconnection simulation. Characteristics of the instability are examined with kinetic and fluid continuum models, and its role in the three-dimensional reconnection simulation is analysed. The saturation level of the electromagnetic LHDI is higher than expected, which leads to strong kinking of the current sheet. Therefore, the magnitude of the initial perturbation has significant impact on the resulting turbulence.

scholarly journals Global View of Current Sheet Thinning: Plasma Pressure Gradients and Large‐Scale Currents

2019 ◽  
Vol 124 (1) ◽  
pp. 264-278 ◽  
Author(s):  
A. V. Artemyev ◽  
V. Angelopoulos ◽  
A. Runov ◽  
A. A. Petrukovich
Keyword(s):  
Current Sheet ◽  
Large Scale ◽  
Plasma Pressure ◽  
Pressure Gradients ◽  
Global View

Effects of Three-Dimensional Pressure Gradients on High-Speed Turbulent Boundary Layers

2021 ◽  
Author(s):  
Scott J. Peltier ◽  
Brian E. Rice ◽  
Ethan Johnson ◽  
Venkateswaran Narayanaswamy ◽  
Marvin E. Sellers
Keyword(s):  
Boundary Layers ◽  
High Speed ◽  
Three Dimensional ◽  
Turbulent Boundary Layers ◽  
Pressure Gradients
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