caa a22 4500 465813771 CHVBK 20180323112122.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF01331795 doi (NATIONALLICENCE)springer-10.1007/BF01331795 Numerical simulation of delayed die swell [Elektronische Daten] [V. Delvaux, M. Crochet] In a recent paper, Joseph et al. showed that, for a number of viscoelastic fluids, one can observe the phenomenon of delayed die swell beyond a critical extrusion velocity, or beyond a critical value of the viscoelastic Mach number. Giesekus had also observed that delayed die swell is a critical phenomenon. In the present paper, we find a set of material and flow parameters under which it is possible to simulate delayed die swell. For the viscoelastic flow calculation, we use the finite element algorithm with sub-elements for the stresses and streamline upwinding in the discretized constitutive equations. For the free surface, we use an implicit technique which allows us to implement Newton's method for solving the non-linear system of equations. The fluid is Oldroyd-B which, in the present problem, is a singular perturbation of the Maxwell fluid. The results show very little sensitivity to the size of the retardation time. We also show delayed die swell for a Giesekus fluid. Steinkopff, 1990 D elayed die s well nationallicence c ritical e xtrusion v elocity nationallicence O ldroyd-B nationallicence viscoelastic M ach number nationallicence G iesekus fluid nationallicence Delvaux V. Unité de Mécanique Appliquée, Université Catholique de Louvain, 2 Place du Levant, 1348, Louvain-La-Neuve, Belgium aut Crochet M. Unité de Mécanique Appliquée, Université Catholique de Louvain, 2 Place du Levant, 1348, Louvain-La-Neuve, Belgium aut Rheologica Acta Steinkopff-Verlag 29/1(1990-01-01), 1-10 0035-4511 29:1<1 1990 29 397 https://doi.org/10.1007/BF01331795 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01331795 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Delvaux V. Unité de Mécanique Appliquée, Université Catholique de Louvain, 2 Place du Levant, 1348, Louvain-La-Neuve, Belgium aut NATIONALLICENCE 700 1- Crochet M. Unité de Mécanique Appliquée, Université Catholique de Louvain, 2 Place du Levant, 1348, Louvain-La-Neuve, Belgium aut NATIONALLICENCE 773 0- Rheologica Acta Steinkopff-Verlag 29/1(1990-01-01), 1-10 0035-4511 29:1<1 1990 29 397 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer