Special Session 3: Analysis of diffuse and sharp interface models

Nonlocal-to-Local Convergence of the Cahn--Hilliard Equation and its Operator
Christoph Hurm
University of Regensburg
Germany
Co-Author(s):    Helmut Abels, Patrik Knopf
Abstract:
We prove convergence of a sequence of weak solutions to the nonlocal Cahn-Hilliard equation to the weak solution to the corresponding local Cahn-Hilliard equation. The analysis is done in the case of sufficiently smooth bounded domains with Neumann boundary condition and a $W^{1,1}$-kernel. The proof is based on an energy method. Additionally, we prove the strong $L^p$-convergence of the nonlocal operator to a local differential operator together with a rate of convergence. The analysis also includes more singular kernels.