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Laplacian Preconditioning for the Inverse Arnoldi Method

Published online by Cambridge University Press:  23 November 2015

Laurette S. Tuckerman*
Affiliation:
PMMH(UMR 7636 CNRS - ESPCI - UPMC Paris 6 - UPD Paris 7 - ParisTech - PSL), 10 rue Vauquelin, 75005 Paris, France
*
*Corresponding author. Email address:laurette@pmmh.espci.fr(L. S. Tuckerman)
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Abstract

Many physical processes are described by elliptic or parabolic partial differential equations. For linear stability problems associated with such equations, the inverse Laplacian provides a very effective preconditioner. In addition, it is also readily available in most scientific calculations in the form of a Poisson solver or an implicit diffusive timestep. We incorporate Laplacian preconditioning into the inverse Arnoldi method, using BiCGSTAB to solve the large linear systems. Two successful implementations are described: spherical Couette flow described by the Navier-Stokes equations and Bose-Einstein condensation described by the nonlinear Schrödinger equation.

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Type
Research Article
Copyright
Copyright © Global-Science Press 2015 

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