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
复制
发表时间:
2017
影响因子:
2.1
通讯作者:
A. R. Mészáros
A. R. Mészáros
中科院分区:
数学2区
文献类型:
--
作者:
Inwon C. Kim;A. R. Mészáros

文献摘要

参考文献

被引文献

相似文献

本文研究了一个非线性、退化的交叉扩散模型,该模型包含两个密度和两个不同的漂移速度。基于Wasserstein空间中的梯度流结构,给出了离散时间解的概念。由于密度的可能混合,它的连续极限只能解决原系统的一个较弱的版本。在一维空间中,我们发现了一个稳定的初始配置,使密度被隔离。这导致了两个密度之间的稳定界面的演化,以及对连续极限的更强收敛结果。特别是可以推导出该系统的标准弱解。我们还研究了系统的不可压缩极限,它解决了总密度的高度约束下的运输。在一个空间维度,我们表明,该问题导致一个两相Hele-Shaw型流。
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.
具有非局部相互作用和尺寸排除的多个物种的交叉扩散模型
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