title: Experimental evidence for an intrinsic route to polymer melt fracture phenomena: a nonlinear instability of viscoelastic Poiseuille flow.
abstract: The production rate of polymer fibers by extrusion is usually limited by the appearance of a series of instabilities ("melt fracture") that lead to unwanted undulations of the surface. We present both qualitative and quantitative experimental evidence that-in addition to previously known polymer-specific scenarios-there is an intrinsic route towards melt fracture type phenomena: a nonlinear ("subcritical") instability of viscoelastic Poiseuille flow.
authors.affiliation: Ecole Normale Supérieure, Laboratoire de Physique Statistique, 24 Rue Lhomond, 75005 Paris, France.
authors.forename: Volfango
authors.initials: V
authors.lastname: Bertola
authors.forename: Bernard
authors.initials: B
authors.lastname: Meulenbroek
authors.forename: Christian
authors.initials: C
authors.lastname: Wagner
authors.forename: Cornelis
authors.initials: C
authors.lastname: Storm
authors.forename: Alexander
authors.initials: A
authors.lastname: Morozov
authors.forename: Wim
authors.initials: W
authors.lastname: van Saarloos
authors.forename: Daniel
authors.initials: D
authors.lastname: Bonn