Technical Report 2011-011

Efficient Preconditioners for Large Scale Binary Cahn-Hilliard Models

Petia Boyanova, Minh Do-Quang, and Maya Neytcheva

April 2011

Abstract: In this work we consider preconditioned iterative solution methods for numerical simulations of multiphase flow problems, modelled by the Cahn-Hilliard equation. We focus on diphasic flows and the construction and efficiency of a preconditioner for the algebraic systems arising from finite element discretizations in space and the theta-method in time. The preconditioner utilizes to a full extent the algebraic structure of the underlying matrices and exhibits optimal convergence and computational complexity properties. Large scale umerical experiments are included as well as performance comparisons with other solution methods.

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