Actions for The Effect of Artificial Diffusivity on the Flute Instability [electronic resource].

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The Effect of Artificial Diffusivity on the Flute Instability [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 16 pages; size: 98.9 Kbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Sometimes, in order to improve the performance of magneto-hydrodynamical codes, artificial diffusivity (D) is introduced in the mass continuity equation. In this communication, an analysis of the effect of the artificial diffusivity on the low-beta plasma stability in a simple geometry is presented. It is shown that, at low diffusivity, one recovers classical results, whereas at high diffusivity the plasma becomes more unstable. Dependence of the stability on D is suppressed if the volume of flux-tube varies insignificantly in the course of the perturbation growth. These observations may help the code runners to identify regimes where the artificial diffusivity is not affecting the results (or vise versa).
Report Numbers
E 1.99:ucrl-jrnl-212005
ucrl-jrnl-212005
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Note
Published through SciTech Connect.
05/03/2005.
"ucrl-jrnl-212005"
Physics of Plasmas 12 8 ISSN 1070-664X; PHPAEN FT
Cohen, B I; Cohen, R H; Hooper, E B; Ryutov, D D; Sovinec, C R.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14738803