On nonlinear cross-diffusion systems: an optimal transport approach
On nonlinear cross-diffusion systems: an optimal transport approach
复制标题
非线性交叉扩散系统:最佳传输方法
DOI:
10.1007/s00526-018-1351-9
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发表时间:
2017
影响因子:
2.1
通讯作者:
A. R. Mészáros
中科院分区:
文献类型:
--
作者:
Inwon C. Kim;A. R. Mészáros
We study a nonlinear, degenerate cross-diffusion model which involves two densities with two different drift velocities. A general framework is introduced based on its gradient flow structure in Wasserstein space to derive a notion of discrete-time solutions. Its continuum limit, due to the possible mixing of the densities, only solves a weaker version of the original system. In one space dimension, we find a stable initial configuration which allows the densities to be segregated. This leads to the evolution of a stable interface between the two densities, and to a stronger convergence result to the continuum limit. In particular derivation of a standard weak solution to the system is available. We also study the incompressible limit of the system, which addresses transport under a height constraint on the total density. In one space dimension we show that the problem leads to a two-phase Hele-Shaw type flow.
DOI:
10.1016/j.na.2017.03.010
发表时间:
--
期刊:
arXiv: Analysis of PDEs
影响因子:
--
作者:
J. Berendsen;M. Burger;J.-F. Pietschmann
通讯作者:
J.-F. Pietschmann