Anomalous Diffusion Limit of Kinetic Equations in Spatially Bounded Domains
Anomalous Diffusion Limit of Kinetic Equations in Spatially Bounded Domains
复制标题
空间有界域中动力学方程的反常扩散极限
DOI:
10.1007/s00220-018-3158-0
复制
发表时间:
2016
影响因子:
2.4
通讯作者:
L. Cesbron
中科院分区:
文献类型:
--
作者:
L. Cesbron
This paper is devoted to the anomalous diffusion limit of kinetic equations with a fractional Fokker–Planck collision operator in a spatially bounded domain. We consider two boundary conditions at the kinetic scale: absorption and specular reflection. In the absorption case, we show that the long time/small mean free path asymptotic dynamics are described by a fractional diffusion equation with homogeneous Dirichlet-type boundary conditions set on the whole complement of the spatial domain. On the other hand, specular reflections will give rise to a new operator which we call specular diffusion operator and write $${(-\Delta)_{{\rm SR}}^{s}}$$(-Δ)SRs. This non-local diffusion operator strongly depends on the geometry of the domain and includes in its definition the interaction between the diffusion and the boundary. We consider two types of domains: half-spaces and balls in $${\mathbb{R}^d}$$Rd. In these domains, we prove properties of the specular diffusion operator and establish existence and uniqueness of weak solutions to the associated heat-type equation.
影响因子:
3.1
作者:
Yan Guo;Chanwoo Kim;D. Tonon;A. Trescases
通讯作者:
Yan Guo;Chanwoo Kim;D. Tonon;A. Trescases
DOI:
10.4171/rmi/942
发表时间:
2014-07
期刊:
arXiv: Analysis of PDEs
影响因子:
--
作者:
S. Dipierro;Xavier Ros-Oton;E. Valdinoci
通讯作者:
S. Dipierro;Xavier Ros-Oton;E. Valdinoci
影响因子:
2.5
作者:
Kim, Chanwoo;Lee, Donghyun
通讯作者:
Lee, Donghyun