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
Article number012022
Book seriesJournal of Physics: Conference Series (Online)
Volume602
Number of pages6
ISSN1742-6596
DOIs
Publication statusPublished - 2015
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

Bibliographical note

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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