A combined linear and nonlinear preconditioning technique for incompressible navier-stokes equations

  • Authors:
  • Feng-Nan Hwang;Xiao-Chuan Cai

  • Affiliations:
  • Department of Computer Science, University of Colorado, Boulder, CO;Department of Computer Science, University of Colorado, Boulder, CO

  • Venue:
  • PARA'04 Proceedings of the 7th international conference on Applied Parallel Computing: state of the Art in Scientific Computing
  • Year:
  • 2004

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Abstract

We propose a new two-level nonlinear additive Schwarz preconditioned inexact Newton algorithm (ASPIN). The two-level nonlinear preconditioner combines a local nonlinear additive Schwarz preconditioner and a global linear coarse preconditioner. Our parallel numerical results based on a lid-driven cavity incompressible flow problem show that the new two-level ASPIN is nearly scalable with respect to the number of processors if the coarse mesh size is fine enough.