Time-stepping schemes for moving grid finite elements applied to reaction-diffusion systems on fixed and growing domains

Authors:
Anotida Madzvamuse
Affiliations:
Department of Mathematics and Statistics, Auburn University, 316A Parker Hall, Auburn, AL 36849, United States
Venue:
Journal of Computational Physics
Year:
2006

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Abstract

In this paper, we illustrate the application of time-stepping schemes to reaction-diffusion systems on fixed and continuously growing domains by use of finite element and moving grid finite element methods. We present two schemes for our studies, namely a first-order backward Euler finite differentiation formula coupled with a special form of linearisation of the nonlinear reaction terms (1-SBEM) and a second-order semi-implicit backward finite differentiation formula (2-SBDF) with no linearisation of the reaction terms. Our results conclude that for the type of reaction-diffusion systems considered in this paper, the 1-SBEM is more stable than the 2-SBDF scheme and that the 1-SBEM scheme has a larger region of stability (at least by a factor of 10) than that of the 2-SBDF scheme. As a result, the 1-SBEM scheme becomes a natural choice when solving reaction-diffusion problems on continuously deforming domains.