Linearly implicit methods for nonlinear evolution equations |
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Authors: | Georgios Akrivis Ohannes Karakashian Fotini Karakatsani |
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Institution: | (1) Computer Science Department, University of Ioannina, 451 10 Ioannina, Greece; e-mail: akrivis@cs.uoi.gr, GR;(2) Mathematics Department, University of Tennessee, Knoxville, TN 37996, USA; e-mail: ohannes@math.utk.edu, US;(3) Mathematics Department, University of Crete, 714 09 Heraklion, Greece; e-mail: fotini@math.uoc.gr, GR |
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Abstract: | Summary. We construct and analyze combinations of rational implicit and explicit multistep methods for nonlinear evolution equations
and extend thus recent results concerning the discretization of nonlinear parabolic equations. The resulting schemes are linearly
implicit and include as particular cases implicit–explicit multistep schemes as well as the combination of implicit Runge–Kutta
schemes and extrapolation. We establish optimal order error estimates. The abstract results are applied to a third–order evolution
equation arising in the modelling of flow in a fluidized bed. We discretize this equation in space by a Petrov–Galerkin method.
The resulting fully discrete schemes require solving some linear systems to advance in time with coefficient matrices the
same for all time levels.
Received October 22, 2001 / Revised version received April 22, 2002 /
Published online December 13, 2002
Mathematics Subject Classification (1991): Primary 65M60, 65M12; Secondary 65L06
Correspondence to: G. Akrivis |
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