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