Particle simulations of boundary‐condition and hf‐field effects on strong double layers in a collisionless bounded plasma

Magnetopause reconnection would be characterized by the density jump across the current sheet, the flow shear across the boundary, and nonzero guide field. While effects of each of these elements have been studied, the effects arising from the combination of these are still unexplored. Two-dimensional full-particle simulations show that the combination of shear flow and/or guide field with density asymmetry induces the sliding motion of theX-line along the magnetopause. The direction of theX-line motion is controlled either by the ion flow at theX-line when the shear flow effects dominate or by the electron flow at theX-line when the guide field effects dominate. The shear flow effects and the guide field effects may counteract each other in determining the direction of theX-line motion and, in the close proximity of the subsolar region where the flow is slow, theX-line motion can be opposite to the flow direction.

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Artificial cooling due to quiet injection in bounded plasma particle simulations

Journal of Computational Physics ◽

10.1016/0021-9991(88)90172-6 ◽

1988 ◽

Vol 77 (2) ◽

pp. 330-339 ◽

Cited By ~ 5

Author(s):

William S Lawson

Keyword(s):

Plasma Particle ◽

Bounded Plasma ◽

Particle Simulations

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A smoothed boundary condition for reducing nonphysical field effects

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems ◽

10.1109/43.602478 ◽

1997 ◽

Vol 16 (4) ◽

pp. 420-423

Author(s):

A.W. Smith ◽

J.W. Parks ◽

J.N. Haralson ◽

K.F. Brennan

Keyword(s):

Boundary Condition ◽

Field Effects

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A Suitable Boundary Condition for Bounded Plasma Simulation without Sheath Resolution

Journal of Computational Physics ◽

10.1006/jcph.1993.1005 ◽

1993 ◽

Vol 104 (1) ◽

pp. 41-49 ◽

Cited By ~ 43

Author(s):

S.E. Parker ◽

R.J. Procassini ◽

C.K. Birdsall ◽

B.I. Cohen

Keyword(s):

Boundary Condition ◽

Plasma Simulation ◽

Bounded Plasma ◽

Suitable Boundary Condition

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Electro-osmosis in kaolinite with pH-dependent surface charge modelling by homogenization

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652010000100016 ◽

2010 ◽

Vol 82 (1) ◽

pp. 223-242 ◽

Cited By ~ 1

Author(s):

Sidarta A. Lima ◽

Marcio A. Murad ◽

Christian Moyne ◽

Didier Stemmelen

Keyword(s):

Boundary Condition ◽

Double Layer ◽

Slip Boundary Condition ◽

Solid Particles ◽

Constitutive Law ◽

Scale Model ◽

Double Layers ◽

Slip Boundary ◽

Monovalent Ions ◽

Ph Dependent

A new three-scale model to describe the coupling between pH-dependent flows and transient ion transport, including adsorption phenomena in kaolinite clays, is proposed. The kaolinite is characterized by three separate nano/micro and macroscopic length scales. The pore (micro)-scale is characterized by micro-pores saturated by an aqueous solution containing four monovalent ions and charged solid particles surrounded by thin electrical double layers. The movement of the ions is governed by the Nernst-Planck equations, and the influence of the double layers upon the flow is dictated by the Helmholtz-Smoluchowski slip boundary condition on the tangential velocity. In addition, an adsorption interface condition for the Na+ transportis postulated to capture its retention in the electrical double layer. Thetwo-scalenano/micro model including salt adsorption and slip boundary condition is homogenized to the Darcy scale and leads to the derivation of macroscopic governing equations. One of the notable features of the three-scale model is there construction of the constitutive law of effective partition coefficient that governs the sodium adsorption in the double layer. To illustrate the feasibility of the three-scale model in simulating soil decontamination by electrokinetics, the macroscopic model is discretized by the finite volume method and the desalination of a kaolinite sample by electrokinetics is simulated.

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