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An efficient solver for the equations of resistive MHD with spatially-varying resistivity

✍ Scribed by D.T. Graves; D. Trebotich; G.H. Miller; P. Colella

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 155 KB
Volume: 227
Category: Article
ISSN: 0021-9991
DOI: 10.1016/j.jcp.2008.01.044

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✦ Synopsis

We regularize the variable coefficient Helmholtz equations arising from implicit time discretizations for resistive MHD, in a way that leads to a symmetric positive-definite system uniformly in the time step. Standard centered-difference discretizations in space of the resulting PDE leads to a method that is second-order accurate, and that can be used with multigrid iteration to obtain efficient solvers.

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