A new numerical framework to simulate viscoelastic free-surface flows with the finite-volume method

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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 languageEnglish
Publication date2013
Number of pages6
Publication statusPublished - 2013
Event1st International Conference on Rheology and Modeling of Materials (ic-rmm1) - Miskolc-Lillafüred, Hungary
Duration: 7 Oct 201311 Oct 2013
Conference number: 1
http://www.ic-rmm1.eu/

Conference

Conference1st International Conference on Rheology and Modeling of Materials (ic-rmm1)
Number1
Country/TerritoryHungary
CityMiskolc-Lillafüred
Period07/10/201311/10/2013
Internet address

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