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Eulerian finite element method for parabolic PDEs on implicit surfaces

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Dziuk, Gerhard and Elliott, Charles M. (2008) Eulerian finite element method for parabolic PDEs on implicit surfaces. Interfaces and Free Boundaries, Volume 10 (Number 1). pp. 119-138. doi:10.4171/IFB/182 ISSN 1463-9963.

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Official URL: http://dx.doi.org/10.4171/IFB/182

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Abstract

We define an Eulerian level set method for parabolic partial differential equations on a stationary hypersurface contained in a domain Omega subset of Rn+1. The method is based on formulating the partial differential equations on all level surfaces of a prescribed function Phi whose zero level set is Gamma. Eulerian surface gradients are formulated by using a projection of the gradient in Rn+1 onto the level surfaces of Phi. These Eulerian surface gradients are used to define weak forms of surface elliptic operators and so generate weak formulations of surface elliptic and parabolic equations. The resulting equation is then solved in one dimension higher but can be solved on a mesh which is unaligned to the level sets of Phi. We consider both second order and fourth order elliptic operators with natural second order splittings. The finite element method is applied to the weak form of the split system of second order equations using piecewise linear elements on a fixed grid. The computation of the mass and element stiffness matrices is simple and straightforward. Numerical experiments are described which indicate the power of the method. We describe how this framework may be employed in applications.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Science, Engineering and Medicine > Science > Mathematics
Library of Congress Subject Headings (LCSH): Differential equations, Parabolic, Finite element method
Journal or Publication Title: Interfaces and Free Boundaries
Publisher: European Mathematical Society Publishing House
ISSN: 1463-9963
Official Date: 2008
Dates:
DateEvent
2008Published
Volume: Volume 10
Number: Number 1
Number of Pages: 20
Page Range: pp. 119-138
DOI: 10.4171/IFB/182
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Deutsche Forschungsgemeinschaft (DFG), Engineering and Physical Sciences Research Council (EPSRC), Alexander von Humboldt-Stiftung

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