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The influence of finite Larmor radius effects on the radial interchange motions of plasma filaments
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10.1063/1.3658033
/content/aip/journal/pop/18/11/10.1063/1.3658033
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3658033
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Spatial structure of particle density for two blobs with initial widths σ = 5ρs0. Length scales are normalized to initial blob width σ. In the top row τ = 0, in the bottom row τ = 3. First column t = 0, second column .

Image of FIG. 2.
FIG. 2.

(Color online) Time evolution of radial X C center of mass position for different ion temperatures τ and initial widths σ. Temporal and spatial scales are normalized by (a) and ρ s0, (b) γ−1 and σ, respectively.

Image of FIG. 3.
FIG. 3.

(Color online) Ion temperature τ = 0, initial blob width σ = 10ρs0, Rayleigh number Ra = 2.5 × 105. Spatial structure of particle density n (top row) and vorticity (bottom row). First column is at t = 0.5γ−1. Time increments in 10γ−1 steps going from left to right. Axes are normalized with the initial blob width σ. Only a part of the simulation domain is shown.

Image of FIG. 4.
FIG. 4.

(Color online) Radial profiles of particle density n, initial widths, and ion temperatures at 5 different times: (a) σ = 10ρs0 and τ = 0, (b) σ = 5ρs0 and τ = 7.0. Rayleigh numbers are Ra = 2.5 × 105 in both plots.

Image of FIG. 5.
FIG. 5.

(Color online) Ion temperature τ = 7.0, initial blob width σ = 5ρs0, Rayleigh number Ra = 2.5 × 105. Spatial structure of particle density n (top row) and vorticity (bottom row). First column is at t = 0.5γ−1. Time increments in 10γ−1 steps going from left to right. Length scales are normalized to the initial blob width σ. Only a part of the simulation domain is shown.

Image of FIG. 6.
FIG. 6.

(Color online) Spatial structure at t = 0.1γ−1 (left column) and t = 2.0γ−1 (right column) of (a) , (b) , and (c) vorticity . Initial blob width σ = 5ρs0, ion temperature τ = 1.0. The amplitude colorings at each time are identical in (a) and (b).

Image of FIG. 7.
FIG. 7.

(Color online) Temporal evolution of electron Helmholtz free and ion gyrocenter energies U e  + U i , generalized E  ×  B energy and the losses U Λ for blobs having width σ = 5 and ion temperatures (a) τ = 0 and (b) τ = 7.

Image of FIG. 8.
FIG. 8.

(Color online) Temporal evolution of energy losses: (a) due to electron particle density diffusion and ion gyrocenter diffusion and (b) generalized viscosity , normalized to the potential energies U e  + U i and the generalized E  ×  B energy U E , respectively, for various blob widths σ and ion temperatures τ.

Image of FIG. 9.
FIG. 9.

(Color online) Spatial structure of particle density n e , initial width σ = 2ρs0, ion temperature τ = 3.0. t = 0.5γ−1 and t = 17.5γ−1 in left and right columns, respectively. Magnetic field points (a) out and (b) into the paper.

Image of FIG. 10.
FIG. 10.

(Color online) Time evolution of (a) radial X C and (b) poloidal Y C center of mass position for different ion temperatures. Initial width σ = 5ρs0.

Image of FIG. 11.
FIG. 11.

(Color online) Time evolution of (a) radial X C and (b) poloidal Y C center of mass position for different ion temperatures. Initial width σ = 20ρs0.

Image of FIG. 12.
FIG. 12.

(Color online) Maximal radial center of mass velocity as a function of (a) Rayleigh number and (b) the ratio of the thermal ion gyroradius ρ i to the initial blob width σ.

Image of FIG. 13.
FIG. 13.

(Color online) Position of the maximal particle density amplitude at t = 10γ−1 as a function of (a) Rayleigh number and (b) ρ i /σ.

Image of FIG. 14.
FIG. 14.

(Color online) Maximal particle density amplitude as a function of time for different initial widths.

Image of FIG. 15.
FIG. 15.

(Color online) Maximal particle density amplitude as a function of Rayleigh number at t = 10γ−1.

Image of FIG. 16.
FIG. 16.

(Color online) I C as a function of time for different initial blob widths σ at (a) τ = 0 and (b) τ = 1.

Image of FIG. 17.
FIG. 17.

(Color online) I C as a function of ρ i /σ at t = 10γ−1.

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/content/aip/journal/pop/18/11/10.1063/1.3658033
2011-11-11
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The influence of finite Larmor radius effects on the radial interchange motions of plasma filaments
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3658033
10.1063/1.3658033
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