title: Nonuniversality in the pinch-off of yield stress fluids: role of nonlocal rheology.
abstract: The pinch-off behavior of yield stress fluids is investigated using droplet and liquid-bridge breakup experiments. Contrary to expectations, the neck thinning behavior depends strongly on the way the breakup experiment is carried out. This nonuniversal behavior can be explained through an analysis of the thinning dynamics as well as the shapes of the fluid necks. Recent nonlocal models for the rheology of yield stress fluids are found to be compatible with the results presented.
authors.affiliation: Université de Bordeaux, Laboratoire Ondes et Matière d'Aquitaine, UMR 5798 U. Bx/CNRS, 351 Cours de la Libération, 33405 Talence, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Louvet
authors.affiliation: Soft Matter Group, Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, Amsterdam, Netherlands.
authors.forename: Daniel
authors.initials: D
authors.lastname: Bonn
authors.affiliation: Université de Bordeaux, Laboratoire Ondes et Matière d'Aquitaine, UMR 5798 U. Bx/CNRS, 351 Cours de la Libération, 33405 Talence, France.
authors.forename: Hamid
authors.initials: H
authors.lastname: Kellay