Comminal, Raphaël

Hattel, Jesper Henri

Spangenberg, Jon

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

Online Research Database In Technology

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

http://orbit.dtu.dk/ws/files/69088882/book_icrmm1.pdf

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

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Online Research Database In Technology