How to approximate the heat equation with Neumann boundary conditions by nonlocal diffusion problems
Rossi, J. D.
Mathematics - Analysis of PDEs | 35K57, 35B40
We present a model for nonlocal diffusion with Neumann boundary conditions in a bounded smooth domain prescribing the flux through the boundary. We study the limit of this family of nonlocal diffusion operators when a rescaling parameter related to the kernel of the nonlocal operator goes to zero. We prove that the solutions of this family of problems converge to a solution of the heat equation with Neumann boundary conditions.