Hans van Duijn is Professor Emeritus at TU Einhoven/NETHERLANDS. He is Mercator Fellow within SFB 1313 "Interface-Driven Multi-Field Processes in Porous Media – Flow, Transport and Deformation" and involved in the Research Project A05 "Pore scale formulations for evaporation, and upscaling to REV scale". Faculty, SFB and department are extremely happy that Hans will visit the IWS from 3rd October to 8th October 2021 in order to continue the scientific discussions mainly with Jun.-Prof. Carina Bringedal, Theresa Schollenberger and Prof. Rainer Helmig.