Interfaces separating two or more species or components of a material are omnipresent in applications in the sciences. Nowadays there are two main classes of models to describe interfaces, both from a theoretical and practical point of view: In classical so-called "sharp interface models" the species or components under consideration fill disjoint domains that are separated by lower dimensional surfaces of a certain regularity. On the other hand in "diffuse interface models" a partial mixing of the species or components on a small length scale is taken into account, which […]