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Magnetic reconnection in a compressible MHD plasma
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10.1063/1.3581077
/content/aip/journal/pop/18/4/10.1063/1.3581077
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/4/10.1063/1.3581077
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Reconnection electric field as a function of inflow plasma, β, and of the magnetic Reynolds number (top panel) and as a function of the magnetic Lundquist number (bottom panel).

Image of FIG. 2.
FIG. 2.

(Color online) Diffusion region aspect ratio as a function of inflow plasma, β, and of the magnetic Reynolds number.

Image of FIG. 3.
FIG. 3.

(Color online) Outflow velocity as a function of inflow plasma, β, and of the magnetic Reynolds number.

Image of FIG. 4.
FIG. 4.

(Color online) Outflow magnetic field as a function of inflow plasma, β, and of the magnetic Reynolds number.

Image of FIG. 5.
FIG. 5.

(Color online) A measure of entropy increase S as a function of inflow plasma, β, and of the magnetic Reynolds number.

Image of FIG. 6.
FIG. 6.

(Color online) Inflow energy density fluxes, scaled by the aspect ratio d/L, for inflow plasma β  =  0.1 as function of the magnetic Reynolds number. The kinetic energy density flux is shown in the blue solid line, enthalpy flux in red-dotted line, and Poynting flux in orange-dashed line.

Image of FIG. 7.
FIG. 7.

(Color online) Outflow energy density fluxes for inflow plasma β = 0.1 as function of the magnetic Reynolds number. The kinetic energy density flux is shown in the blue solid line, enthalpy flux in red-dotted line, and Poynting flux in orange-dashed line.

Image of FIG. 8.
FIG. 8.

(Color online) Differences between outflow and scaled inflow energy density fluxes for inflow plasma β = 0.1 as a function of the magnetic Reynolds number. Differences for the kinetic energy density flux are shown by the blue solid line, for enthalpy flux in red-dotted line, and for Poynting flux in orange-dashed line. The figure shows that incoming Poynting flux is converted predominantly into enthalpy flux and to a smaller degree into kinetic energy flux. In the case of R < 1, we find a situation, where kinetic energy flux becomes an energy source for the reconnection process, albeit providing only a small contribution. This anomalous feature is related to the large outflow magnetic field or small values of the Reynolds number R.

Image of FIG. 9.
FIG. 9.

(Color online) Behavior of the heating function H as defined in (32).

Image of FIG. 10.
FIG. 10.

(Color online) Reconnection rate for four different values of the polytropic index.

Image of FIG. 11.
FIG. 11.

(Color online) Reconnection electric field as a function of inflow plasma, β, and of the magnetic Reynolds number for the nonconservative energy equation.

Image of FIG. 12.
FIG. 12.

(Color online) Energy flux balance for the nonconservative energy equation and inflow plasma β = 0.1. The solid line shows the sum of all inflow energy fluxes and the dotted line shows the sum of all outflow fluxes. The dashed line is the sum of all outflow fluxes, multiplied by the aspect ratio δ. The difference between the dashed and solid lines indicates a small mismatch in the flux balance, which does not have a significant impact on the reconnection rate.

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/content/aip/journal/pop/18/4/10.1063/1.3581077
2011-04-27
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic reconnection in a compressible MHD plasma
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/4/10.1063/1.3581077
10.1063/1.3581077
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