Experimental evidence for an intrinsic route to polymer melt fracture phenomena: a nonlinear instability of viscoelastic Poiseuille flow.
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.
Bertola
Volfango
V
Ecole Normale Supérieure, Laboratoire de Physique Statistique, 24 Rue Lhomond, 75005 Paris, France.
Meulenbroek
Bernard
B
Wagner
Christian
C
Storm
Cornelis
C
Morozov
Alexander
A
van Saarloos
Wim
W
Bonn
Daniel
D