Convergence of Numerical Schemes for a Conservation Equation with Convection and Degenerate Diffusion

The approximation of problems with linear convection and degenerate nonlinear diffusion, which arise in the framework of the transport of energy in porous media with thermodynamic transitions, is done using a θ-scheme based on the centred gradient discretisation method. The convergence of the numeri...

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Bibliographic Details
Published inJournal of computational mathematics Vol. 39; no. 3; pp. 428 - 452
Main Authors R. Eymard, R. Eymard, C. Guichard, C. Guichard, Xavier Lhébrard, Xavier Lhébrard
Format Journal Article
LanguageEnglish
Published Global Science Press 01.01.2021
Subjects
Mathematics
Numerical Analysis
Degenerate diffusion
θ-scheme
Linear convection
Gradient discretisation method
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ISSN0254-9409
1991-7139
DOI10.4208/jcm.2002-m2018-0287

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Summary:The approximation of problems with linear convection and degenerate nonlinear diffusion, which arise in the framework of the transport of energy in porous media with thermodynamic transitions, is done using a θ-scheme based on the centred gradient discretisation method. The convergence of the numerical scheme is proved, although the test functions which can be chosen are restricted by the weak regularity hypotheses on the convection field, owing to the application of a discrete Gronwall lemma and a general result for the time translate in the gradient discretisation setting. Some numerical examples, using both the Control Volume Finite Element method and the Vertex Approximate Gradient scheme, show the role of θ for stabilising the scheme.
ISSN:0254-9409
1991-7139
DOI:10.4208/jcm.2002-m2018-0287