Abstract
A new method for the simulation of 2D viscoelastic flow is presented. Numerical stability is obtained by the logarithmic-conformation change of variable, and a fully-implicit pure-streamfunction flow formulation, without use of any artificial diffusion. As opposed to other simulation results, our calculations predict a hydrodynamic instability in the 4:1 contraction geometry at a Weissenberg number of order 4. This new result is in qualitative agreement with the prediction of a non-linear subcritical elastic instability in Poiseuille flow. Our viscoelastic flow solver is coupled with a volume-of-fluid solver in order to predict free-surfaces in extrusion.
| Original language | English |
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| Publication date | 2013 |
| Number of pages | 6 |
| Publication status | Published - 2013 |
| Event | 1st International Conference on Rheology and Modeling of Materials (ic-rmm1) - Miskolc-Lillafüred, Hungary Duration: 7 Oct 2013 → 11 Oct 2013 Conference number: 1 http://www.ic-rmm1.eu/ |
Conference
| Conference | 1st International Conference on Rheology and Modeling of Materials (ic-rmm1) |
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| Number | 1 |
| Country/Territory | Hungary |
| City | Miskolc-Lillafüred |
| Period | 07/10/2013 → 11/10/2013 |
| Internet address |