Growth of non-axisymmetric disturbances of the free surface in the filament stretching rheometer: experiments and simulation.

Henrik Koblitz Rasmussen, Anders Bach, Pierre-Yves Longin, Ole Hassager

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Abstract

A filament stretching rheometer has been equipped with a bottom plate with a number of equally distributed perturbations of the circular rim. The temporal development of the resulting disturbance of the meniscus is followed with video recording and with simulations. At high strain rates the surface perturbations grow into a number of fluid columns. It is shown that the growth is associated with strain hardening of the material. The relevant Deborah number is the product of a time constant associated with the non-linear properties of the fluid and the imposed extension rate.
Original languageEnglish
JournalJournal of Non-Newtonian Fluid Mechanics
Volume108
Pages (from-to)163-186
ISSN0377-0257
DOIs
Publication statusPublished - 2002
Event12th International Workshop on Numerical Methods for Non-Newtonian Flows - Montery Bay,CA, United States
Duration: 15 Jul 200117 Jul 2001
Conference number: 12

Conference

Conference12th International Workshop on Numerical Methods for Non-Newtonian Flows
Number12
CountryUnited States
CityMontery Bay,CA
Period15/07/200117/07/2001

Keywords

  • Filament stretching rheometer
  • Endplate instability
  • Viscoelastic
  • Langrangian
  • Finite element

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