• Article  

      On numerical simulations of polymer extrusion instabilities 

      Achilleos, Evdokia C.; Georgiou, Georgios C.; Hatzikiriakos, Savvas George (2002)
      The objective of this study is mainly to review recent work concerning the numerical modeling of the stick-slip and gross melt fracture polymer extrusion instabilities. Three different mechanisms of instability are discussed: ...
    • Article  

      A timestepper approach for the systematic bifurcation and stability analysis of polymer extrusion dynamics 

      Kavousanakis, M. E.; Russo, L.; Siettos, C. I.; Boudouvis, Andreas G.; Georgiou, Georgios C. (2008)
      We discuss how matrix-free/timestepper algorithms can efficiently be used with dynamic non-Newtonian fluid mechanics simulators in performing systematic stability/bifurcation analysis. The timestepper approach to bifurcation ...