Rolie-Poly fluid flowing through constrictions: Two distinct instabilities

Handle URI:
http://hdl.handle.net/10754/599536
Title:
Rolie-Poly fluid flowing through constrictions: Two distinct instabilities
Authors:
Reis, T.; Wilson, H.J.
Abstract:
Elastic instabilities of entangled polymer melts are common in industrial processes but the physics responsible is not well understood. We present a numerical linear stability study of a molecular based constitutive model which grants us physical insight into the underlying mechanics involved. Two constriction flows are considered - one shear dominated, the other extension dominated - and two distinct instabilities are found. The influence of the molecular structure and the behaviour of the polymer dynamics are investigated and in both cases chain relaxation and orientation play a crucial role. This suggests a molecular-based physical interpretation of the underlying mechanisms responsible for flow instabilities. © 2013 Elsevier B.V.
Citation:
Reis T, Wilson HJ (2013) Rolie-Poly fluid flowing through constrictions: Two distinct instabilities. Journal of Non-Newtonian Fluid Mechanics 195: 77–87. Available: http://dx.doi.org/10.1016/j.jnnfm.2013.01.002.
Publisher:
Elsevier BV
Journal:
Journal of Non-Newtonian Fluid Mechanics
KAUST Grant Number:
KUK-C1-013-04
Issue Date:
May-2013
DOI:
10.1016/j.jnnfm.2013.01.002
Type:
Article
ISSN:
0377-0257
Sponsors:
We would like to think Dr Mehmet Sahin and Dr Ian Griffiths for their helpful advice and discussions. We would also like to thank the anonymous referees for their pertinent comments which helped improve the quality of this article. This work was funded through the Microscale Polymer Processing project (mu PP<SUP>2</SUP>), EPSRC GR/T11807/01. This publication was based on work supported in part by Award No KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorReis, T.en
dc.contributor.authorWilson, H.J.en
dc.date.accessioned2016-02-28T05:52:57Zen
dc.date.available2016-02-28T05:52:57Zen
dc.date.issued2013-05en
dc.identifier.citationReis T, Wilson HJ (2013) Rolie-Poly fluid flowing through constrictions: Two distinct instabilities. Journal of Non-Newtonian Fluid Mechanics 195: 77–87. Available: http://dx.doi.org/10.1016/j.jnnfm.2013.01.002.en
dc.identifier.issn0377-0257en
dc.identifier.doi10.1016/j.jnnfm.2013.01.002en
dc.identifier.urihttp://hdl.handle.net/10754/599536en
dc.description.abstractElastic instabilities of entangled polymer melts are common in industrial processes but the physics responsible is not well understood. We present a numerical linear stability study of a molecular based constitutive model which grants us physical insight into the underlying mechanics involved. Two constriction flows are considered - one shear dominated, the other extension dominated - and two distinct instabilities are found. The influence of the molecular structure and the behaviour of the polymer dynamics are investigated and in both cases chain relaxation and orientation play a crucial role. This suggests a molecular-based physical interpretation of the underlying mechanisms responsible for flow instabilities. © 2013 Elsevier B.V.en
dc.description.sponsorshipWe would like to think Dr Mehmet Sahin and Dr Ian Griffiths for their helpful advice and discussions. We would also like to thank the anonymous referees for their pertinent comments which helped improve the quality of this article. This work was funded through the Microscale Polymer Processing project (mu PP<SUP>2</SUP>), EPSRC GR/T11807/01. This publication was based on work supported in part by Award No KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectConstriction flowsen
dc.subjectElastic instabilitiesen
dc.subjectRolie-Poly constitutive modelen
dc.titleRolie-Poly fluid flowing through constrictions: Two distinct instabilitiesen
dc.typeArticleen
dc.identifier.journalJournal of Non-Newtonian Fluid Mechanicsen
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
dc.contributor.institutionUCL, London, United Kingdomen
kaust.grant.numberKUK-C1-013-04en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.