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Rheologica Acta

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01.06.2009 | Original Contribution

Effect of branching in cross-slot flow: the formation of “W cusps”

verfasst von: D. G. Hassell, D. Hoyle, D. Auhl, O. Harlen, M. R. Mackley, T. C. B. McLeish

Erschienen in: Rheologica Acta | Ausgabe 5/2009

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Abstract

The sensitivity of the principal stress difference (PSD) profile to molecular architecture is demonstrated for flow in a cross-slot geometry. For materials with low levels of branching, the pattern along the outlet centre line exhibited “single cusps”, while an increase in molecular branching was found to lead to “W cusps”. The formation of these W cusps was found to be independent of extensional rate for the conditions probed, and they were formed initially at the stagnation point and travelled along the outlet centre line with time. Comparison with simulations performed using a multi-mode “pom-pom” model failed to predict W cusps, although the general level of PSD was accurately captured.

Vorheriger Artikel An experimental evaluation of the behaviour of mono and polydisperse polystyrenes in Cross-Slot flow

Nächster Artikel Structure and orientation dynamics of sepiolite fibers–poly(ethylene oxide) aqueous suspensions under extensional and shear flow, probed by in situ SAXS

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Titel: Effect of branching in cross-slot flow: the formation of “W cusps”
verfasst von: D. G. Hassell
D. Hoyle
D. Auhl
O. Harlen
M. R. Mackley
T. C. B. McLeish
Publikationsdatum: 01.06.2009
Verlag: Springer-Verlag
Erschienen in: Rheologica Acta / Ausgabe 5/2009
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-009-0353-0

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