Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 227, Issue 10, Pages 4797-4804Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2008.01.044
Keywords
resistive MHD; Helmholtz equation; multigrid
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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. (C) 2008 Published by Elsevier Inc.
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