73
IRUS TotalDownloads
Altmetric
A discontinuous Galerkin method for nonlinear parabolic equations and gradient flow problems with interaction potentials
File | Description | Size | Format | |
---|---|---|---|---|
paper.pdf | Accepted version | 2.99 MB | Adobe PDF | View/Open |
1-s2.0-S0021999117307106-main.pdf | Published version | 3.89 MB | Adobe PDF | View/Open |
Title: | A discontinuous Galerkin method for nonlinear parabolic equations and gradient flow problems with interaction potentials |
Authors: | Sun, Z Carrillo de la Plata, J Shu, CW |
Item Type: | Journal Article |
Abstract: | We consider a class of time-dependent second order partial differential equations governed by a decaying entropy. The solution usually corresponds to a density distribution, hence positivity (non-negativity) is expected. This class of problems covers important cases such as Fokker–Planck type equations and aggregation models, which have been studied intensively in the past decades. In this paper, we design a high order discontinuous Galerkin method for such problems. If the interaction potential is not involved, or the interaction is defined by a smooth kernel, our semi-discrete scheme admits an entropy inequality on the discrete level. Furthermore, by applying the positivity-preserving limiter, our fully discretized scheme produces non-negative solutions for all cases under a time step constraint. Our method also applies to two dimensional problems on Cartesian meshes. Numerical examples are given to confirm the high order accuracy for smooth test cases and to demonstrate the effectiveness for preserving long time asymptotics. |
Issue Date: | 28-Sep-2017 |
Date of Acceptance: | 22-Sep-2017 |
URI: | http://hdl.handle.net/10044/1/51233 |
DOI: | https://dx.doi.org/10.1016/j.jcp.2017.09.050 |
ISSN: | 0021-9991 |
Publisher: | Elsevier |
Start Page: | 76 |
End Page: | 104 |
Journal / Book Title: | Journal of Computational Physics |
Volume: | 352 |
Copyright Statement: | © 2017 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Sponsor/Funder: | The Royal Society Engineering & Physical Science Research Council (EPSRC) |
Funder's Grant Number: | WM120001 EP/P031587/1 |
Keywords: | 01 Mathematical Sciences 02 Physical Sciences 09 Engineering Applied Mathematics |
Publication Status: | Published |
Appears in Collections: | Applied Mathematics and Mathematical Physics Faculty of Natural Sciences Mathematics |