Multigrid solver for axisymmetrical 2D fluid equations

Details Multigrid solver for axisymmetrical 2D fluid equations Multigrid solver for axisymmetrical 2D fluid equations

2008-11-26

arxiv.org/abs/0811.4446v1

Physics

Plasma Physics

preliminary version; presented at 28 ICPIG, July 15-20, 2007, Prague, Czech Republic

Scientific paper

We have developed an efficient algorithm for steady axisymmetrical 2D fluid equations. The algorithm employs multigrid method as well as standard implicit discretization schemes for systems of partial differential equations. Linearity of the multigrid method with respect to the number of grid points allowed us to use $256\times 256$ grid, where we could achieve solutions in several minutes. Time limitations due to nonlinearity of the system are partially avoided by using multi level grids(the initial solution on $256\times 256$ grid was extrapolated steady solution from $128\times 128$ grid which allowed using "long" integration time steps). The fluid solver may be used as the basis for hybrid codes for DC discharges.

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