• search hit 3 of 19
Back to Result List

On the transport limit of singularly perturbed convection-diffusion problems on networks

Submission Status:revision under review
  • We consider singularly perturbed convection-diffusion equations on one-dimensional networks (metric graphs) as well as the transport problems arising in the vanishing diffusion limit. Suitable coupling condition at inner vertices are derived that guarantee conservation of mass as well as dissipation of a mathematical energy which allows us to prove stability and well-posedness. For single intervals and appropriately specified initial conditions, it is well-known that the solutions of the convection-diffusion problem converge to that of the transport problem with order O(sqrt(eps)) in the L1(L2)- norm with diffusion eps -> 0. In this paper, we prove a corresponding result for problems on one-dimensional networks. The main difficulty in the analysis is that the number and type of coupling conditions changes in the singular limit which gives rise to additional boundary layers at the interior vertices of the network. Since the values of the solution at these network junctions are not known a-priori, the asymptotic analysis requires a delicate choice of boundary layer functions that allows to handle these interior layers.

Download full text files

Export metadata

Metadaten
Author:Herbert Egger, Nora Philippi
Document Type:Article
Language:English
Date of Publication (online):2020/04/17
Date of first Publication:2020/10/13
Release Date:2020/10/13
Institutes:Technische Universität Darmstadt
Subprojects:C04
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International