Time-dependent development of flow instabilities of non-Newtonian melts and suspensions with rigid particles

H. S. Tang, D. M. Kalyon

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations

Abstract

A time-dependent solution of flow instabilities and extrudate surface irregularities of non-Newtonian melts and suspensions with rigid particles was presented. The model showed that the critical shear stress, at which apparent slip occurs, played an important role to determine if the capillary flow is steady or unsteady. The results confirm that the stability of the wall boundary condition during flow is very important. It was found that the resulting wall slip condition is not stable with non-periodic excursions between the slip and stick conditions.

Original languageEnglish
Pages3849-3885
Number of pages37
StatePublished - 2004
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: 7 Nov 200412 Nov 2004

Conference

Conference2004 AIChE Annual Meeting
Country/TerritoryUnited States
CityAustin, TX
Period7/11/0412/11/04

Keywords

  • Extrudate
  • Flow instabilities
  • Surface irregularities
  • Wall slip

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