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A Lagrangian Scheme for the Solution of Nonlinear Diffusion Equations Using Moving Simplex Meshes

Abstract:

A Lagrangian numerical scheme for solving nonlinear degenerate Fokker–Planck equations in space dimensions 𝑑≥2 is presented. It applies to a large class of nonlinear diffusion equations, whose dynamics are driven by internal energies and given external potentials, e.g. the porous medium equation and the fast diffusion equation. The key ingredient in our approach is the gradient flow structure of the dynamics. For discretization of the Lagrangian map, we use a finite subspace of linear maps in...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1007/s10915-017-0594-5

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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
Publisher:
Springer Nature Publisher's website
Journal:
Journal of Scientific Computing Journal website
Volume:
75
Issue:
3
Pages:
1463-1499
Publication date:
2017-11-07
Acceptance date:
2017-10-27
DOI:
EISSN:
1573-7691
ISSN:
0885-7474
Language:
English
Keywords:
Pubs id:
1098248
Local pid:
pubs:1098248
Deposit date:
2020-04-07

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