In this note we concentrate on iterative solution of the linear algebraic systems resulting from the finite-difference discretization of 3D forward mCSEM simulation. We review and test a recently developed multigrid preconditioner to an iterative solver and introduce some changes into the smoothing scheme of the multigrid algorithm. We substitute the originally used symmetric multiplicative Schwarz smoothing scheme with that of additive Schwarz. We also found an approximately optimal value for the scaling factor needed for additive Schwarz smoothing. Our changes result in a faster and naturally parallelizable algorithm.
|Publication status||Published - 2012|
|Event||St. Petersburg 2012 International Conference on Geosciences: Making the Most of the Earth's Resources - Saint Petersburg, Russian Federation|
Duration: 2 Apr 2012 → 5 Apr 2012
|Conference||St. Petersburg 2012 International Conference on Geosciences: Making the Most of the Earth's Resources|
|Period||2/04/12 → 5/04/12|