title: Fractional diffusion equation in a confined region: surface effects and exact solutions.
abstract: Surface effects on a diffusion process governed by a fractional diffusion equation in a confined region with spatial and time dependent boundary conditions are investigated. First, we consider the one-dimensional case with the boundary conditions rho(0,t)=Phi0(t) and rho(a,t)=Phia(t). Subsequently, the two-dimensional case in the cylindrical symmetry with rho(a,theta,t)=Phia(theta,t) and rho(b,theta,t)=Phib(theta,t) is investigated. For these cases, we also obtain exact solutions for an arbitrary initial condition by using the Green's function approach.
authors.affiliation: Universidade Estadual de Maringá, Departamento de Física, Avenida Colombo 5790, 87020-900 Maringá, Paraná, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Rossato
authors.forename: M K
authors.initials: MK
authors.lastname: Lenzi
authors.forename: L R
authors.initials: LR
authors.lastname: Evangelista
authors.forename: E K
authors.initials: EK
authors.lastname: Lenzi