title: Preface to the Special Issue: Cleaning with bubbles.
authors.affiliation: Mesoscale Chemical Systems Group, University of Twente, 7500AE Enschede, The Netherlands; BuBclean, Institutenweg 25, 7521PH Enschede, The Netherlands.
authors.forename: David Fernández
authors.initials: DF
authors.lastname: Rivas
authors.affiliation: BuBclean, Institutenweg 25, 7521PH Enschede, The Netherlands.
authors.forename: Bram
authors.initials: B
authors.lastname: Verhaagen