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 language | English |
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Pages | 3849-3885 |
Number of pages | 37 |
State | Published - 2004 |
Event | 2004 AIChE Annual Meeting - Austin, TX, United States Duration: 7 Nov 2004 → 12 Nov 2004 |
Conference
Conference | 2004 AIChE Annual Meeting |
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Country/Territory | United States |
City | Austin, TX |
Period | 7/11/04 → 12/11/04 |
Keywords
- Extrudate
- Flow instabilities
- Surface irregularities
- Wall slip