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dc.contributor.authorOlley, Peter*
dc.date.accessioned2008-09-01T14:10:27Z
dc.date.available2008-09-01T14:10:27Z
dc.date.issued2004
dc.identifier.citationOlley, P.(2004). A study of the quadratic molecular stress function constitutive model in simulation. Journal of Non-Newtonian Fluid Mechanics. Vol.125 Nos. 2-3, 171-183.
dc.identifier.urihttp://hdl.handle.net/10454/522
dc.description.abstractConstitutive models that conform to separable KBKZ specification have been shown to fit steady-state strain hardening rheological data in planar and uniaxial elongational flows, but with inaccuracy in the rate of strain hardening. The single parameter Molecular Stress Function model of Wagner [Rheol. Acta, 39 (2000), 97-109] has been shown to accurately fit the rise-rate in experimental data for a number of strain hardening and strain softening materials. We study this models accuracy against the well characterised IUPAC LDPE data, and present a method for full implementation of this model for flow solution which is suitable for incorporating into existing separable KBKZ software. A new method for particle tracking in arbitrarily aligned meshes, which is efficient and robust, is given. The Quadratic Molecular Stress Function (QMSF) model is compared to existing separable KBKZ based models, including one which is capable of giving planar strain hardening; the QMSF is shown to fit experimental rheological and contraction flow data more convincingly. The issue of `negative correction pressures¿ notable in some Doi-Edwards based models is addressed. The cause is identified, and leads to a logical method of calculation which does not give these anomalous results.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1016/j.jnnfm.2004.11.005en_US
dc.rights© 2004 Elsevier. Reproduced in accordance with the publisher's self-archiving policy.en_US
dc.subjectMolecular Stress Functionen_US
dc.subjectMSFen_US
dc.subjectStressen_US
dc.subjectStrain Hardeningen_US
dc.subjectKBKZen_US
dc.subjectNegative Correction Pressureen_US
dc.titleA study of the quadratic molecular stress function constitutive model in simulationen_US
dc.status.publishedPublisheden_US
dc.status.refereedYesen_US
dc.typeArticleen_US
refterms.dateFOA2018-07-18T02:12:56Z


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